These high-quality Offshore Angler Round Single-Barrel Sleeves have a burr-free, nonabrasive finish and provide the strength and corrosive resistance saltwater anglers expect. When using single-barrel sleeves, choose a sleeve with an inside diameter of more than twice the diameter of the wire being crimped. Per 100. Sizes: #2 .033 ID #3 .047 ID #4 .055 ID #5 .071 ID #6 .080 ID #7 .106 ID Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Crimps.