Housing Material: Polycarbonate (PC).Contact material: Pure copper silver plating.Rated Current: 120A.Rated Voltage: 600V.Voltage:For 12v or 24v Use. Contact Barrel Wire Size 2-6AWG(33.3-13.3 mm²).These are genderless connectors (not male or female) . Flammability Rating of Housing Material: UL94 V- 0.Operating temperature range: -20°to 105°. The Plugs is Impact Resistant Polycarbonate and Connectors are Silver plated Solid Copper Terminals.Provide simplified assembly and minimize the number of components.Silver plated copper contacts inside housings that strongly force the contacts together. Battery plug, jump connector for batteries, jump leads, race cars, boats, trucks, forklifts etc Package Contents:2 x housing ; 4 x Terminal