One Design Parts

The Harken Ball Bearing Block Set, introduced and class legal in 2010, is lighter, stronger, and offers less friction than the old style blocks. The set includes four blocks; the single and becket for the boom, and the two that make up the one piece...

75mm Rachet Block Harken Part # 2670 LP Part # 91283

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. Sheave 16 mm / 5/8 in Length: 54 mm / 2 1/8...

This Harken block has a main 40mm sheave and a 29mm fiddle below it. This part is popular with opti sailors for making their mainsheet 4:1. 

Block Plate, w Blocks, Harken for the ILCA Sailboat. 

Optimist Club Rig Bag. This bag is designed for use with the sail tied on both the mast and the boom. Roomy, great for beginners. Makes it easy to put away you both ship-shape. This bag is made out of a heavy duty blue Cordura® that is then...

Drain Bushing Assy, ILCA LP Part # 91284 LP Part # 91284

The 433 Dinghy Clew Hooks are designed for ILCA and other loose-footed dinghies. It installs permanently on the boom and allows you to instantly attach your sail in high wind and waves. Weight - 0.65oz Harken Part # 433

Upgraded 40mm traveler block for the ILCA. Class legal. Built by Harken. LP Part # 91451

Upgraded 40mm boom block for the ILCA. Class legal. Built by Harken. LP Part # 91449

Upgraded 40mm boom block with becket for the ILCA. Class legal. Built by Harken. LP Part # 91450

Block, 25mm, Wire, Fork Mount Harken Part # 466