[High Quality Material] The wire connector is made of tinned copper core and PP insulation material. The base pantograph is made of real tinned copper to achieve maximum conductivity and strongest ripple. [Safe and fast] The T-connector is a fully insulated quick connector, which can be terminated and then connected to a fully insulated quick connector. These self-stripping T-Tap electrical connector connectors allow quick, easy, and reliable insertion of existing cables. [Easy to Use] Use these self-stripping electrical connectors to pick up electricity in the middle of the span, without cutting or stripping , without stripping or twisting, and without special tools.[Widely used] homes, workshops, garages, factories, etc. It helps to solve all connection and maintenance work. The best choice for electricians, technicians, home users, hobbyists and beginners. [Various colors] Color-coded tubes can easily determine the correct connector size for each application: 0.5-1.0 mm / 22 -16 AWG (red); 0.75-2.5mm / 16-14 AWG (blue); 2.5- 4.0 mm / 12-10 AWG (yellow).