Easy to use: you can just put 2 stripped wires into the solder sleeve and heat it with a hot air , and the insulating tube shrink with a shrinkage ratio of 2:1 to form a waterproof seal, so as to complete the connection What get: the package comes with 150 pieces of 12-10 AWG yellow heat shrink butt connectors with heat shrinkable, waterproof and conductive properties, which are sufficient to meet your various needs Practical design: these solder seal wire connectors are different from ordinary heat-shrinkable tubes, designed with solder ring and do not need crimping; The solder seal terminals are transparent and can be accurately inspected when the wires are stripped and inserted inside Insulated and waterproof: the electrical wire terminal comes with outer polyolefin tube and inner hot-melt ring, which can effectively improve waterproof performance, so it is very suitable for the automotive and marine industries Scope of usage: the insulated butt splices are useful tools to provide protection for wires, which are often applied in automobile, ship, marine, motorcycle and vehicles, and also applied for scientific wiring projects, Weight: 0.2425084882 pounds, Manufacturer: Feyoalix