Double Barrel Crimp Sleeves - Heavy Duty Brass Fishing Line Tube by Gaffer Sportsfishing Made with heavy-duty Brass, our crimp sleeves are second to none for making leaders and rigs, especially for salt water fishing! Our precision designed, Burr-free sleeves can be used on monofilament, fluorocarbon or wire leader. For extra durability and strength, sleeves are coated with Black Nickle Oxide. Prevents corrosion and are non-abrasive Available in 1.0, 1.3, and 1.6mm sizes. Use with Gaffer Sportsfishing Crimping Plier for best results. Search for B00RPLUOQW