Ronstan Series 40 BB Single Utility Block - Loop Head Sheave Diameter:40 mm Built on E weight paper

Built on E weight paper backing for added durability

Directions: Wash off loose dirt and grime with Star brite Vinyl Shampoo or Boat Wash

non-porous surfaces as a Disinfectant

Film-backed discs are part of the 3M Perfect-It Paint Finishing System

Ronstan Series 40 BB Single Utility Block - Loop Head Sheave Diameter:40 mm Built on E weight paperRonstan Series 40 Ball Bearing Single Utility Block, Loop Head RF40101 Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Low friction, 2 stage ball bearing system High static and dynamic load capacity Lightweight Cheek cut outs for easy bearing maintenance Applications Mainsheet Halyard Vang Spinnaker control lines on off the beach catamarans, one design classes and sportsboats up to 8m (26ft)