40mm Single Block with Shackle Swivel. Technical features of the BBB40: Stainless steel ball bearing races, stainless steel ball bearings and glass fibre reinforced sheave for best strength even under high dynamic loads. Acetal bearing cage to prevent ball-to-ball friction and to reduce weight. Composite, 50% Glass fibre and 50% Polyamide.

Sheave diameter: 40mm.

Safe Working Load: 551lbs.

Breaking Load: 1102 lbs.

Max Line: 10mm.

Bolt Size: 4mm.