The AlumiConn lug style wire connector has been used to make thousands of homes and buildings across the US safe from the fire hazard caused by aluminum wiring. Due to it's Consumer Product Safety Commission (CPSC) approval, insurance company recognition and UL approval, the economical AlumiConn connector has been a highly requested item by Electrical Contractors. Two ports allow conductors to remain separate, permitting the lug to: - Provide lower resistance, therefore lower temperature. - Provide longer-term reliability. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.