40 mm Ball Bearing Block - Single, Swivel CX25 this block is designed to

this block is designed to route a halyard from the mast and back to the cockpit

That means

Easy to install with the included 2 mm Dyneema line

The polymer washer insulates stainless from aluminium to prevent corrosion and polymer thrust bearings resist side loads

Model: endadapter

40 mm Ball Bearing Block - Single, Swivel CX25 this block is designed toThe BBB40 Single Swivel Block is a 40mm ball bearing block for dynamic applications and medium load. It features a swiveling shaft with swivel lock a plastic washer which is placed between block body and shackle for fixed 0 or 90 shackle position. The block features stainless steel ball bearings for strength and smooth rotation and glass fiber reinforced polyamide sheave and cheeks. Acetal bearing cage to prevent ball to ball friction and to reduce