30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist It features two 40 mm

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

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

control lines and spinnaker sheets in applications where fixed mounting is required

Fasteners: 1x MFT M5

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

30 mm Ball Bearing Block - Single, Stand-Up, Eyestrap Optimist It features two 40 mmThe 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.