Insulated and waterproof: The electrical wire terminal comes with a polyolefin outer tube and a hot-melt inner ring, which can effectively improve the sealing performance, so it is very popular in the automobile and marine industries Practical design: These solder wire connectors are different from ordinary heat shrink tubes, and designed with solder ring and do not require crimping; The terminals of the solder joint are transparent and can be accurately inspected when the wires are stripped and inserted inside Simple operation: you can just put 2 stripped wires into the solder sleeve and heat it with a hot air gun, and the insulating tube will shrink with a shrinkage ratio of 2:1 to form a tight seal, to complete the connection Wide range of uses: butt splices Insulated end caps are useful tools for providing good protection of wires, which are often used in automobiles, ships, marine, motorcycles and vehicles, and also applied for scientific wiring projects Package includes: You will receive 300 pieces of 22-18 AWG red heat shrink butt connectors, with heat shrinkable, waterproof and conductive properties, which are enough to meet your various needs Features: You can simply strip the wires, insert them into the solder wire connector and apply heat to complete the connection. The double-walled waterproof tube ensures a tight seal and prevents the corrosion of wires. The transparent sleeve allows precise inspection and easy control of the welding process. The solder joint splice is characterized by tightness, prevention corrosion and insulation, helping to get rid of electrical accidents. Wide application: Insulated butt splices are useful tools for marine, automobile , motorcycle, boat, etc. Specifications: Material: nylon tube Color: as shown Size : Total length: 40 mm Diameter: 2.7 mm Cable section: 0.5-1.0 mm2 (AWG: 22- 18) Parameters: Working temperature: -55 degree centigrade to 125 degree centigrade Shrinkage temperature: > 160 degrees centigrade Protection level: IP67 Dielectric strength: 1KV Package includes: 300 x Butt Wire Connectors solder heat shrink butt Notes: Please allow slight deviation due to manual measurement. Small objects, please keep children away of them.