6 pairs of MC4 male/female double rings seal waterproof solar panel cable connectors Install easily and quickly, come with 1 pair of hex keys Waterproof water and dust proof, 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 environmental requirements extreme weather conditions Product Description Specification: Rated Voltage: 1000 V DC Rated current: 25 A (2.5-4.0 mm2) Degree of protection: ip2*/IP67 Flammability rating: ul94-v0 Voltage trial: 6000 V (50 Hz, 1 min) Safety: class 2 Overvoltage category/Pollution index: CATIII/2 Cable adapter: od4.5-7.0 (2.5-4.0 mm2) Resistor contact connector: 0.5m; # x3 a9; Force insert; #x2264; 50 N Remove force; #x2265; 50 N Conductor material of connector: copper, tin Connection: crimp Insulator material of connector: ppo or PBT Operating temperature range: -40~+90° Fits cable 2.5mm2/4mm2/6mm2 (awg14/12/10) Snap in lock system