●【High Conductivity】With pure brass, Wire Connectors provide a high degree conductivity. ●【Anti-Corrosion】Tinned coating, Heat Shrink Wire Connectors have corrosion resistance. ●【Dustproof&Moistureproof】With heat shrinkable waterproof intermediate pipe, Heat Shrink Wire Connectors are wear resistant and durable, dustproof and moistureproof. ●【PACKAGE CONTENT 】120 PCS Bare Copper Wire Connectors With 3:1 Heat Shrink Tubing. ●【Safety Guarantee】With transparent material, the wire in electrical connectors is easy to be seen, which ensure the wire is not exposed.