This 76 mm diameter jib roller is a chafe protector and helps the jib trim over the guardrail upwind. It can be adjusted to the wire diameter (max. 9 mm) by drilling it out. SAILGUARD has a slot that can be opened and closed. This allows it to be attached to the railing, baby stay or shrouds without a loose end. Hole Ø: 6.5 mm, can be drilled out to a diameter of 9 mm if required. Material: UV-resistant plastic. Set of 2.