30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist is placed between the block

is placed between the block body and the shackle to lock the shackle at either 0° or 90°

It features two 40 mm sheaves supported by stainless steel ball bearings for smooth

designed for high-performance rigging under dynamic loads

The RBB60 Cheek Block with Becket and M8 mount is designed for fixed installations in high-load

The 50 mm Plain Bearing Block - Cheek is designed for medium-sized boats to guide lines on deck

30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist is placed between the blockThe BBB30 Single Stand Up Block is a 30mm ball bearing block designed for medium sized boats or trim lines. It features stainless steel ball bearings for high strength under dynamic loads, with a glass fiber reinforced composite construction for durability. Acetal bearing cage to prevent ball to ball friction and to reduce weight. Easy to install on deck with included hardware. Ideal for moderate and dynamic loads with low friction rotation.