20 mm Ball bearing Block - Triple, Becket Jib A plastic washer acts as

A plastic washer acts as a swivel lock

Ball cages to reduce ball-to-ball friction and weight

The BBB60 Fiddle Becket Block combines a large and small sheave along with a becket for added rigging flexibility

It features a large 60 mm primary sheave

The BBB40 Triple Becket Swivel Block is equipped with three 40 mm sheaves

20 mm Ball bearing Block - Triple, Becket Jib A plastic washer acts asThe Seldn BBB20 Triple Becket block is a 20mm ball bearing block designed for control lines on dinghies and keelboats. It is lightweight and strong, with stainless steel ball bearings for smooth rotation. Can be attached with a shackle or line. Safe working Load: 300 kg Breaking Load: 600 kg Max line size: 6 mm