King Innovation 3 Port AlumiConn Connector. Approved by the Consumer Products Safety Commission (CPSC) and insurance companies. Secure, mechanical connection of conductors. Runs approximately 25°F cooler than purple twist-ons. Provides a safer connection. Separate ports eliminate intermixing of conductors. One piece for easy installation. Dielectric silicone inhibitor reduces corrosion of connection. Tin-plated lug and nickel-plated screws. UL 486C to meet US and Canadian standards. Suitable for aluminum to aluminum, aluminum to copper, and copper to copper wire splices. Available in 2-Port and 3-Port styles. Max. Voltage: 300V. Temperature Rating: 105°C. Flammability Rating: V-2. Wire Type: Aluminum/Aluminum, Aluminum/Copper, Copper/Copper. Aluminum Wire Range: Min #12/Max #10. Copper Wire Range: Min #18/Max #10.