80 mm Plain Bearing Block - Single, Swivel, Shackle adaptor Eye/Eye The lower T is attached

The lower T is attached to a Seldén backing plate

with a 50% reduction in the safe working and breaking loads for the top set

A plastic washer acts as a swivel lock

B-MIN: 120 mm

When used as a turning block for spinnaker sheet

80 mm Plain Bearing Block - Single, Swivel, Shackle adaptor Eye/Eye The lower T is attachedThe PBB80 Single Block with Shackle Adaptor is designed to fit deck ring T base shafts of other mast brands. Consequently, this block is designed to route a halyard from the mast and back to the cockpit. It features an 80 mm glass fibre reinforced sheave with polymer bushing, stainless steel strap for durability, glass fiber reinforced composite cheeks to prevent jamming and a practical switch from swiveling to fixed shackle. Safe working Load: 2000