6 Pairs MC4 Male/Female Double Rings Waterproof Joint Connectors Solar Panel Cable Install easily and quickly, come with 1 pair of hex keys Waterproof and dustproof, can be used outdoors in all weather conditions Self-locking provides a secure connection Specially designed for connecting solar photovoltaic systems with high mechanical and extreme weather requirements Product Description Specification: Rated voltage: 1000V DC Rated current: 25A (2.5-4.0mm2) Protection grade: IP2X/IP67 Flammability rating: UL94-V0 Test voltage: 6000V (50 Hz, 1 min) Safety: Class 2 Overvoltage Category/Pollution Index: CATIII/2 Cable Adapter: od4.5-7.0 (2.5-4.0 mm2) Connector Contact Resistance: 0.5 m; # x3 a9; Insertion Force; # x2264; 50 N Removal Force; # x2265; 50 N Connector Conductor Material: Copper, Tin Connection: Crimp Connector Insulation Material: PPO or PBT Operating Temperature Range: -40 ~ +90° Suitable for 2.5mm2/4mm2/6mm2 (AWG14/12/10) cable Snap-in Locking System Drawing Package