Premium material: The solar cable is made of two layers of insulating rubber, a protective cover and tinned copper wire, the solar connector is made of PPO plastic and copper crimp connection material. p> Technical data: Wire thickness: 12 AWG (approx. 4 mm²). Normal cross section: 4.0 mm². Rated current: 30 A. Rated voltage: 1000 V DC. Flame retardant level: UL94-V0. Ambient temperature: -40 °C to +90 °C. Insulation thickness: 0.5mm, cable TUV approved. Waterproof and durable: The MC-4 female and male connector with high-strength silicone seal, IP67 waterproof, dustproof and UV resistant, radiation resistant, cold resistant, high strength, impact resistance, flame retardancy. Operation method: Insert the connector into the solar panel or inverter without cutting it, and tighten the cable or crimp terminal of the connector. The locking design on both sides of the solar connector prevents the connector from loosening and provides a safety guarantee. It needs to be opened with a special