Harken 29mm Bullet Double Block and Becket Shipping_Standard Sheave 29 mm Length 70

Sheave 29 mm Length  70 mm Weight  35 g Maximum Line  8 mm Maximum Working Load  136 kg  Breaking Load  907 kg

638 O ring is placed around the gasket

Dia = 20mm

and 2614 have on/off switches

Triple blocks are generally used in systems such as cunninghams or vangs

Harken 29mm Bullet Double Block and Becket Shipping_Standard Sheave 29 mm Length 70Low friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications. Sheave 29 mm Length 89 mm Weight 78 g Shackle Pin 5 mm Maximum Line 8 mm Maximum Working Load 181 kg Breaking Load 907 kg