Schaefer Double Aluminum Block w/Front Side Shackle, Sheave Dia. 1 7/16" Recommended Foul Weather Gear A coordinating jacket is available

A coordinating jacket is available separately when you need full-suit protection

One method to weigh the aft end of the boom is to stand on a bathroom scale and note the difference when lifting the boom

Helly Hansen Mandal Waterproof Jacket

Weight Alum: 7

Composition:

Schaefer Double Aluminum Block w/Front Side Shackle, Sheave Dia. 1 7/16" Recommended Foul Weather Gear A coordinating jacket is availableProduct Description Schaefer Double Aluminum Block w Front Side Shackle, Sheave Dia. 1 7 16" Double block with front side shackle. Works with 303 33 for a 4: 1 purchase or 303 15 for a 3: 1 purchase. Delrin(tm) sheaves ensure smooth operation and high safe working loads. For boats to 25', control lines on boats to 30'. Specifications: Sheave Dia.: 1 7 16 in. Thickness: 1 7 16 in. (37 mm) Width: 1 9 16 in. (40 mm) Length: 3 25 32 in. (96 mm) SWL: 1000