Good insulating, resistant against most chemicals and salt-water,extremely cold-proof and almost unbreakable. CEJIE" brand industrial plugs and sockets are in compliance with the following international standards:IEC60309-1 & IEC60309-2,CEIEN60309-1 & CEIEN60309-,they are also compliance with the standards:VDE0623 & B4343.The base materials are NYLON6,which provides good features for the products ...