... line of cable gland, like PG, M,NPT,G. thread..... speci 1.Material: parts A,C,E are made of UL approved nylon PA66 ... and rubber part,large range in clamping cable, ultra-strong stretching resistance, waterproof, dustproof,and high ability to resist salt,acid,alkali ... well as special colors that can be designed at request. nylon cable gland of PG type