Safety Wire Connector Material: Nylon 66,94V-2 certificated by UL and 99.9% pure copper Safety Wire Connector Material:Nylon 66,94-2 certificated by ULUsage: Peel the coat of wire, than insert to tube, use pincers to fix them.Feature:Nylon shell, long copper tube, easy to conduct electricity and hold wire tightly. Safety Wire Connector