Ultra lightweight for high performance boats. Carbon black Delrin ball bearings. Lightweight carbon fiber-reinforced Carbo-Cams® for racing where weight is critical, or where adjustments are less frequent. Ball bearings and Carbo-Cams® UV-stabilized with carbon-black additive for maximum protection. Working Load: 200lb. Breaking Load: 500lb. Max line diameter: 3/8". Min line diameter: 1/8". Fasteners: #10 FH. Weight: 1-1/2 oz.