MULTIFARIOUS TERMINALS Heat Shrink Wire Connectors kit includes: 10 x Butt Connectors White: Diameter 1.7 mm, Cable cross-section 0.25-0.34 mm; (A.W.G.:26-24); 23 x Butt Connectors Red: Diameter 2.7 mm, Cable cross-section 0.5-1.0 mm; (A.W.G.:22-18); 12 x Butt Connectors Blue: Diameter 4.5 mm, Cable cross-section 1.5-2.5 mm; (A.W.G.:16-14); 5 x Butt Connectors Yellow: Diameter 6.0 mm, Cable cross-section 4.0-6.0 mm; (A.W.G.:12-10). 50 x Black Heat Shrink Tubing: 3.2mm * L20mm Different Color with wire gauge imprint provides easy identification. Perfect for vehicle, motorcycle, boat, DIY and other outdoor/indoor electrical wirings. DURABILITY AND WATERPROOF Heat Shrink Wire Connectors can protect the outer layer of wire, solder ring weld the wires, hot melt adhesive can enclose the sealing area. It provides high tensile strength as well as resistance to stretch and mechanical damage. High elasticity and good wrapping perfomance can adapt to the bending of the wire and ensure a stable connection. It resists: oil high temperature water corrosion HIGH CONDUCTIVITY High quality materials provide excellent conductivity, increased current flow, and ensures less voltage instability. The product is made of heat shrinkable tubing, low temperature solder ring and waterproof hot melt adhesive. EASY TO USE NO need to crimp. Color-coded tubing makes it easy for you to match needed connector. Operation steps: Strip wire insulation. Twist the strands together. Heat continuosly rotating the wire. The tubing will shrink down. Solder will flow through the stripped wires.