Brand new UL and TUV rated MC4 solar cable connectors in a 20 pack. Used to connect solar panels to charge controller, batteries, or other panels. Greener World Store Branded. Type: connector Application: solar system Gender: female and male color: black Applications: solar system Rated current: 30A 2~4mm Square Connector for mc4 Rated voltage: 1000V DC Test voltage: 6000V(50Hz,1min.) Insulation material: PPO Contact material: Copper,Tin Plated Contact resistance of plug connectors: 0.5mΩ Insertion force/Withdrawal force: ≤50N / ≥50N Connecting System: Crimp connection