PREMIUM MATERIAL: High quality tinned copper cylinder makes the connectors to strong conductivity and stable performance. In addition, the outer tube is made of polyolefin, which is heat shrink and insulating. EASY TO USE: Insert the stripped wire into the connectors to , use the tool to crimp the cylinder of the connectors to , then heat with a hot gun until the tube is firmly attached to the cable. The operation is simple and the large shrinkage ratio (3:1) creates a good weather seal. WIDE APPLICATIONS: The connectors to heat shrink can be widely used in marine applications, boats, automobiles, etc. In addition, the A connectors are waterproof and solid to meet circuit connection needs. DURABILITY AND CONVENIENCE: The translucent tube allows you to observe the status of the connection and improve efficiency. The use of connectors to heat shrink is convenient, good material ensures safety and prolongs usefulness., Manufacturer: Bumdenuu