Shell Material: Quality and durable PC insulating material. Contact material: Tin plated Copper. Reliable Quality Made from insulated material, which is flame-retardant, corrosion resistance, long service life. It can prevent electrical leakage. AITRIP lever wire kit can be used for motor, machineryelectrical control, power supply, home appliance, lighting, machinery and other wire Comply with all electrical standards. Suitable for 22-18 AWG Wires. Rated Voltage: 600V; Rated Current: 32A.Ensure long-lasting wire connection. The 1 conductor electrical wire connector is reusable and operated easily. Multiple lever connectors can be spliced into a wiring group to meet your different needs. The package included 20pcs transparent red and blue lever wire connectors, 10pcs Non-transparent lever wire connectors.