Ronstan 40mm Orbit Block: Single w/Swivel Head

Reduce weight and bulk with Ronstan's Series 40 Ball Bearing Orbit Blocks. They are made almost entirely of high-tech, composite, polymer materials.

Ronstan's two-stage bearing system features high-compression grade Acetal ball bearings and a secondary full-contact Nylatron sheave and full contact bearing for dynamic loads, which results in minimum friction.

Use these blocks in mainsheet and spinnaker sheet, halyard, vang, and backstay systems on dinghies, sportboats, and small keelboats; and for control line applications on larger boats. Make sure you have a standard Dee shackle with a slotted pin of 5/32 in diameter for attachment.

This single swivel block has a stainless steel head for ultimate durability, compatibility with harsh fixing points, and unlimited block rotation. Make sure you have a standard Dee shackle with a slotted pin of 5/32 in diameter for attachment.