PIUMA 57mm single composite fiddle blockAll Viadana composite ball bearing blocks are extremely light and strong, making them perfect for use on dinghies and keelboats for a performance edge. All composite ball bearing blocks have composite cheeks, Delrin sheaves and twin race ball bearings, with stainless steel rivets, and include shackles as pictured. Specifications Max. sheave size: 57 mm (2 1 4") Min. sheave size: 34 mm (1 11 32") Max. line size: 12 mm (7 16") Overall height: 152mm (6")

Neoprene crotch construction

sheave size: 34 mm (1 11/32")

The outer cuffs are adjustable to keep the sleeves in the right place and better fit

Sheave size: 57 mm (2-1/4")

Hook and loop attachment to enable use with certain wetsuits and the pro neo short

3 way foldable construction

cushioning inner padding

Overall height: 29 mm (1-1/16")

lined in mesh

International 420 mainsheet system with blocks for 4:1 purchase and ratchet

Breaking strengths

10m x 6mm Evo Race 78