6 Pairs MC4 Male/Female Double Rings Waterproof Joint Solar Panel Cable Connectors 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 to connect 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 degree: IP2*/IP67 Flammability rating: UL94-V0 Test voltage: 6000V (50Hz, 1min) Safety: Class 2 Overvoltage Category/Pollution Index: CATIII/2 Cable Adapter: od4.5-7.0 (2.5-4.0 mm2) Connector Contact Resistance: 0.5m; # x3 a9; Insertion force; #x2264; 50 N Remove force; #x2265; 50 N Connector conductor material: copper, tin Connection: crimp Connector insulating 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 Contents: 6 x