... of nylon, long copper inside spread the scope of wire end closed connector,electric connectors1, Crust material: Nylon 66 approved by UL ... , fireproof 94V22, Usage: RCCN closed-end wire connector can be used to wire connect in the electrical equipment ... tail skin of the wire away, insert it into the connector, pushed down by clamp tool YAC-6Certificates: UL, CE, CSA ...