RONSTAN Series 55 Orbit BB Cheek Block, RF55151 Sailboat Blocks & Hardware_57 mm Carbo Fiddle Block - Swivel Lewmar Thruster anode has a

Lewmar Thruster anode has a specially designed stainless-steel sheath for optimal retention

Acetal sheave

Harken 29mm Carbo Air® 90° Fixed-Head Single Block allows a 2:1 or 3:1 purchase system

Low profile and lightweight

RONSTAN Series 55 Orbit BB Cheek Block, RF55151 Sailboat Blocks & Hardware_57 mm Carbo Fiddle Block - Swivel Lewmar Thruster anode has aSeries 55 Ball Bearing Orbit Blocks feature our 2 stage bearing system and are engineered to achieve the highest possible strength to weight ratio. They are lightweight and high performance 55mm blocks commonly used for mainsheets and spinnaker sheets on dinghies, sports boats, and small keelboats up to 9m (30'). Lightweight Kilogram for a kilogram of working load, BB and RT Orbit Blocks are the world's lightest. The unique orbital design allows the