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Harken 29mm Carbo Air Block w/Swivel MPN-340 SKU: CWR-79079
MPN: 340- $41.03
$37.30- $41.03
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29mm Carbo Air Block with SwivelLow-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: 66mm / 2-5/8in...- $41.03
$37.30- $41.03
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Harken 75mm Carbo Air Block w/Swivel MPN-2660 SKU: CWR-79077
MPN: 2660- $136.51
$124.10- $136.51
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75mm Carbo Air Block with SwivelLow-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: 75mm / 2-15/16in Length: 137mm / 5-3/8in...- $136.51
$124.10- $136.51
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Harken 40mm Carbo Air Fiddle Block w/Swivel & Becket MPN-2656 SKU: CWR-79076
MPN: 2656- $81.69
$74.26- $81.69
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40mm Carbo Air Fiddle Block with Swivel & BecketLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an...- $81.69
$74.26- $81.69
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Harken 40mm Carbo Air Fiddle Block w/Swivel MPN-2655 SKU: CWR-79075
MPN: 2655- $72.95
$66.32- $72.95
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40mm Carbo Air Fiddle Block with SwivelLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an excellent choice...- $72.95
$66.32- $72.95
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Harken 40mm Carbo Air Block w/Swivel MPN-2636 SKU: CWR-79074
MPN: 2636- $53.30
$48.45- $53.30
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40mm Carbo Air Block with SwivelLow-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: 40mm / 1-9/ 16in Length: 86mm /...- $53.30
$48.45- $53.30
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Harken 57mm Carbo Air Fiddle Block w/Swivel & Becket MPN-2622 SKU: CWR-79073
MPN: 2622- $102.32
$93.02- $102.32
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57mm Carbo Air Fiddle Block with Swivel & 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: 57mm / 2-1/4in Length:...- $102.32
$93.02- $102.32
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Harken 57mm Carbo Air Block w/Swivel MPN-2600 SKU: CWR-79072
MPN: 2600- $77.47
$70.43- $77.47
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57mm Carbo Air Block with SwivelLow-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: 57mm / 2-1/4in Length: 110mm / 4-5/16in...- $77.47
$70.43- $77.47
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Harken 16mm Block w/Swivel MPN-417 SKU: CWR-79059
MPN: 417- $44.44
$40.40- $44.44
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16mm Block with SwivelThe 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working...- $44.44
$40.40- $44.44
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Harken 16mm Triple Block w/Becket MPN-409 SKU: CWR-79058
MPN: 409- $76.37
$69.43- $76.37
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16mm Triple Block with BecketThe 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race.Specifications: Sheave: 16mm / 5/8in. Length: 57mm / 2-1/4in....- $76.37
$69.43- $76.37
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Harken 16mm Triple Block MPN-408 SKU: CWR-79057
MPN: 408- $72.59
$65.99- $72.59
- (--10%)
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16mm Triple BlockThe 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race.Specifications: Sheave: 16mm / 5/8in. Length: 46mm / 1-13/16in. Weight: 41g...- $72.59
$65.99- $72.59
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Harken 16mm Double Block w/Becket MPN-407 SKU: CWR-79056
MPN: 407- $56.23
$51.12- $56.23
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16mm Double Block with Becket The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race.Specifications: Sheave: 16mm / 5/8in Length: 54mm / 2-1/8in...- $56.23
$51.12- $56.23
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Harken 16mm Double Block MPN-406 SKU: CWR-79055
MPN: 406- $51.47
$46.79- $51.47
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- Unit price
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16mm Double BlockThe 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race.Specifications: Sheave: 16mm / 5/8in. Length: 43mm / 1-11/16in. Weight: 27g...- $51.47
$46.79- $51.47
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Harken 16mm Block w/Becket MPN-405 SKU: CWR-79054
MPN: 405- $28.33
$25.75- $28.33
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- Unit price
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16mm Block with BecketThe 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working...- $28.33
$25.75- $28.33
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Harken 16mm Block MPN-404 SKU: CWR-79053
MPN: 404- $24.73
$22.48- $24.73
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16mm BlockThe 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. The...- $24.73
$22.48- $24.73
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Harken 29mm Double Carbo Air Block MPN-381 SKU: CWR-79052
MPN: 381- $63.13
$57.39- $63.13
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29mm Double 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: 54mm / 2-1/8in. Weight:...- $63.13
$57.39- $63.13
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Harken 16mm Forkhead Block MPN-376 SKU: CWR-79050
MPN: 376- $35.05
$31.86- $35.05
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16mm Forkhead BlockThe 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load.Specifications:...- $35.05
$31.86- $35.05
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Harken 29mm Triple Carbo Air Block w/Swivel MPN-344 SKU: CWR-79048
MPN: 344- $97.80
$88.91- $97.80
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29mm Triple Carbo Air Block with SwivelLow-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: 73mm /...- $97.80
$88.91- $97.80
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Harken 25mm Wire Block w/Shackle MPN-300 SKU: CWR-79045
MPN: 300- $66.06
$60.05- $66.06
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25mm Wire Block with ShackleLightweight, low-friction wire blocks carry wire halyards and high-strength control lines on boats of all sizes.Specifications: Sheave: 25mm / 1in. Weight: 28g / 1oz. Shackle pin: 5mm / 3/16in, Maximum wire: 2mm / 3/32in. Maximum line: 4mm / 5/32in. Maximum...- $66.06
$60.05- $66.06
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Harken 22mm Micro Block w/Swivel MPN-292 SKU: CWR-79044
MPN: 292- $41.39
$37.63- $41.39
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22mm Micro Block with SwivelLow-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes.Specifications: Sheave: 22mm / 7/8in. Length: 60mm / 2-3/8in. Weight: 28g / 1oz. Shackle pin: 4mm /...- $41.39
$37.63- $41.39
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Harken 22mm Fiddle Micro Block w/V-Jam & Becket MPN-245 SKU: CWR-79043
MPN: 245- $66.18
$60.16- $66.18
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22mm Fiddle Micro Block with V-Jam & BecketLow-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes.Specifications: Sheave: 22mm / 7/8in. Length: 102mm / 4in. Weight: 57g / 2oz. Shackle...- $66.18
$60.16- $66.18
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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.