Insulated Heat Shrink Butt Wire Electrical Crimp Terminal Connector Sold by iztoss,Color coded tubing with wire gauge imprint provides easy identification The barrel is created from one seamless piece of metal that eliminates the problem of the barrel opening Provides outstanding wire contact, increased current flow and superior tensile strength Translucent, adhesive-lined polyolefin tubing that allows visual inspection, prevents wire corrosion and provides a waterproof seal Conforms to automotive manufacturer's specifications for wiring repairs necessary for maintaining electrical warranties 100% brand new and high quality, shrinkage ratio 3?1. Standard crimp and then seal heat shrink butt connectors. Dual-walled design, excellent stretch and mechanical damage resistance, high elasticity keeps steady performance. Ideal translucent provides tensile strength, allows visual inspection, prevents corrosion, and provided a waterproof seal. For best results use a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal. 1x Pack of 100 Heat Shrink Butt Wire Crimp Connector. Red connector: Suits cable/ wire sizes 0.5-1.0mm2 22-18 A.W.G Blue connector: Suits cable/ wire sizes 1.5-2.5mm2 16-14 A.W.G White connector: Suits cable/ wire sizes 0.25-0.35mm2 26-24 A.W.G Yellow connector: Suits cable/ wire sizes 4.0-6.0mm2 12-10 A.W.G It can shrink in a matter of seconds and quickly cool down Adopt safety flame retardant material, fine workmanship, safe non-toxic, hot soft elastic, good insulation performance Heat it up with a hot air gun and extrud at the middle