Ronstan Series 75 BB Halyard Core Block Sheave Diameter:75 mm unlike others that use a

unlike others that use a plastic ball that breaks down or becomes sticky over time

all silicone free

Universal across all BigFoot Polishing System Movements

3M Perfect-It Boat Wash is an important first step in achieving a truly professional gelcoat finish

Lightweight forged construction

Ronstan Series 75 BB Halyard Core Block Sheave Diameter:75 mm unlike others that use aRonstan Series 75 Ball Bearing Halyard Core Block, screw pin with roller head RF74108 Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Suits direct attachment to mainsail headboard for 2: 1 halyard. Removable 8 mm (5 16 inch) screw pin at head Acetal roller on head pin to suit spliced line attachment Materials Sheave: U. V. stabilised