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Harken 60mm Triple Aluminum Element Block w/Swivel MPN-6272 SKU: CWR-80429
MPN: 6272- $217.15
$197.41- $217.15
- (--10%)
- Unit price
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60mm Triple Aluminum Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing....- $217.15
$197.41- $217.15
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- Unit price
- per
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Harken 60mm Double Aluminum Element Block w/Swivel & Becket MPN-6270 SKU: CWR-80428
MPN: 6270- $194.93
$177.21- $194.93
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- Unit price
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60mm Double Aluminum Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven...- $194.93
$177.21- $194.93
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- Unit price
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Harken 60mm Double Aluminum Element Block w/Swivel MPN-6269 SKU: CWR-80427
MPN: 6269- $178.63
$162.39- $178.63
- (--10%)
- Unit price
- per
60mm Double Aluminum Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing....- $178.63
$162.39- $178.63
- (--10%)
- Unit price
- per
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Harken 60mm Single Aluminum Element Block w/Swivel MPN-6260 SKU: CWR-80425
MPN: 6260- $82.36
$74.87- $82.36
- (--10%)
- Unit price
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60mm Single Aluminum Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing....- $82.36
$74.87- $82.36
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- Unit price
- per
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Harken 60mm Single Aluminum Element Block w/Swivel & Becket MPN-6261 SKU: CWR-80426
MPN: 6261- $96.65
$87.86- $96.65
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- Unit price
- per
60mm Single Aluminum Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven...- $96.65
$87.86- $96.65
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- Unit price
- per
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Harken 45mm Single Aluminum Element Fiddle Block w/Swivel & 150 Cam Cleat MPN-6235 SKU: CWR-80424
MPN: 6235- $144.20
$131.09- $144.20
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- Unit price
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45mm Single Aluminum Element Fiddle Block with Swivel & 150 Cam CleatElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave...- $144.20
$131.09- $144.20
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- Unit price
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Harken 45mm Single Aluminum Element Fiddle Block w/Swivel, Becket & 150 Cam Cleat MPN-6234 SKU: CWR-80423
MPN: 6234- $143.29
$130.26- $143.29
- (--10%)
- Unit price
- per
45mm Single Aluminum Element Fiddle Block with Swivel, Becket & 150 Cam CleatElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the...- $143.29
$130.26- $143.29
- (--10%)
- Unit price
- per
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Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing MPN-RF35109HL SKU: CWR-80102
MPN: RF35109HL- $138.55
$125.95- $138.55
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- Unit price
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Series 30 Ball Bearing Block Single Becket Option LashingBall Bearing Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight...- $138.55
$125.95- $138.55
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Harken 40mm Carbo Air Block w/Cam Cleat & Becket MPN-2646 SKU: CWR-79745
MPN: 2646- $182.67
$166.06- $182.67
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- Unit price
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40mm Carbo Air Block with Cam Cleat & BecketLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.Specifications: Sheave Ø (mm)40 mm Sheave...- $182.67
$166.06- $182.67
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- Unit price
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Harken 40mm Carbo Air Block w/Cam Cleat MPN-2645 SKU: CWR-79744
MPN: 2645- $173.75
$157.95- $173.75
- (--10%)
- Unit price
- per
40mm Carbo Air Block with Cam CleatLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø (in)1...- $173.75
$157.95- $173.75
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- Unit price
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Harken 40mm Carbo Air Cheek Block MPN-2644 SKU: CWR-79742
MPN: 2644- $51.22
$46.56- $51.22
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- Unit price
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40mm Carbo Air Cheek BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø (in)1 9/16 in...- $51.22
$46.56- $51.22
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- Unit price
- per
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Harken 40mm Carbo Air Double Fixed Block w/Becket MPN-2643 SKU: CWR-79740
MPN: 2643- $109.41
$99.46- $109.41
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- Unit price
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40mm Carbo Air Double Fixed Block with BecketLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø...- $109.41
$99.46- $109.41
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- Unit price
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Harken 40mm Carbo Air Double Fixed Block MPN-2642 SKU: CWR-79738
MPN: 2642- $100.67
$91.52- $100.67
- (--10%)
- Unit price
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40mm Carbo Air Double Fixed BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Speciications: Sheave Ø (mm)40 mm Sheave Ø (in)1 9/16...- $100.67
$91.52- $100.67
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- Unit price
- per
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Harken 40mm Carbo Air Triple Swivel Block w/Becket MPN-2641 SKU: CWR-79737
MPN: 2641- $207.93
$189.03- $207.93
- (--10%)
- Unit price
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40mm Carbo Air Triple Swivel Block with BecketLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø...- $207.93
$189.03- $207.93
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- Unit price
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Harken 40mm Carbo Air Triple Swivel Block MPN-2640 SKU: CWR-79736
MPN: 2640- $199.27
$181.15- $199.27
- (--10%)
- Unit price
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40mm Carbo Air Triple Swivel BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø (in)1 9/16...- $199.27
$181.15- $199.27
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- Unit price
- per
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Harken 40mm Carbo Air Double Swivel Block w/Becket MPN-2639 SKU: CWR-79735
MPN: 2639- $129.49
$117.72- $129.49
- (--10%)
- Unit price
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40mm Carbo Air Double Swivel Block with BecketLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø...- $129.49
$117.72- $129.49
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- Unit price
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Harken 40mm Carbo Air Double Swivel Block MPN-2638 SKU: CWR-79734
MPN: 2638- $120.69
$109.72- $120.69
- (--10%)
- Unit price
- per
40mm Carbo Air Double Swivel BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø (in)1 9/16...- $120.69
$109.72- $120.69
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- Unit price
- per
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Harken 40mm Pivoting Lead Block - Carbo-Cam® Cleat MPN-2157 SKU: CWR-79733
MPN: 2157- $116.67
$106.06- $116.67
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- Unit price
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40mm Pivoting Lead Block - Carbo-Cam® CleatHigh-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same as Classic models,...- $116.67
$106.06- $116.67
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- Unit price
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Harken 40mm Carbo Air Pivoting Lead Block w/Aluminum Cam-Matic® Cleat MPN-2156 SKU: CWR-79732
MPN: 2156- $124.78
$113.44- $124.78
- (--10%)
- Unit price
- per
40mm Carbo Air Pivoting Lead Block with Aluminum Cam-Matic® CleatHigh-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same...- $124.78
$113.44- $124.78
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Harken 29mm Carbo Air Block MPN-348 SKU: CWR-79080
MPN: 348- $24.30
$22.09- $24.30
- (--10%)
- Unit price
- per
29mm Carbo Air BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.Specifications: Sheave: 29mm / 1-1/8in Length: 49mm / 1-15/16in Weight: 23g...- $24.30
$22.09- $24.30
- (--10%)
- Unit price
- per
Frequently Asked Questions
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Repack bearings annually or every 10,000 miles with marine-grade grease to prevent water intrusion and seizing. Check for play or heat after each launch.
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Hubs are sized by axle spindle (1-1/16", 1-3/8", 1-3/4"); match brake type (electric/drum/hydraulic) and bolt pattern (4/5/6 on 4.5-6.5" centers).
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Transom savers, tie-down straps, and fenders protect hulls during towing; LED light kits ensure visibility, while bunks/rollers reduce launch friction.
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Use bow/stern straps rated for 2x boat weight, cross-strap hull sides, and check bunks for even weight distribution to avoid stress cracks.
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Choose 1,200-2,000 lb capacity for tongue weights up to 10% of trailer GVWR; crank or A-frame jacks for easy boat positioning.