40 mm Plain Bearing Block - Single, Swivel Soft Attachment Optimist This block is designed for

This block is designed for dynamic rigging with high efficiency and control

even with cold hands

It features stainless steel ball bearings for high strength under dynamic loads

it features black anodized aluminum construction

40 mm Plain Bearing Block - Single, Swivel Soft Attachment Optimist This block is designed forThe PBB40 Single Swivel Block is a 40mm plain bearing block with a swiveling shaft. A swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0 or 90 shackle position. Suitable for heavy and static loads in halyard tuning, mainsheet systems and boom vang. Polymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming. Safe working Load: 350 kg Breaking Load: 700 kg Max line size: 8 mm