Simple operation: you can just put 2 stripped wires into the solder sleeve and heat it with a hot air , and the insulating tube will shrink with a shrinkage ratio of 2:1, forming a waterproof seal, thus completing the connection Practical design: these solder sealing joints are different from ordinary heat shrinkable tubes, and adopt solder ring design without crimping; The solder sealed terminal is transparent and can be accurately inspected when the wire is peeled off and inserted inside Insulated and waterproof features: the electrical wire terminal are designed with an outer polyolefin tube and inner hot melt ring, which will promote waterproof performance effectively, popular in the automotive and marine industries What you will get: you will receive 500 pieces of 22-18 AWG red heat shrinkable butt connectors, with heat shrinkable, waterproof and conductive features, they can meet your various needs, bringing many conveniences Wide range of uses: the insulation butt joint is a