Bee Valve Inc. offers Santoprene Dust Caps and Plugs in three sizes, 1”, 2”, and 3”. The fittings are designed to keep pipe and hose interiors clean while providing protection for mating adapters and couplers, particularly during transport. Caps come standard with stainless steel arms, pins, and rings. Santoprene is a thermoplastic elastomer made from a cross-link mixture of EPDM rubber and polypropylene. This combination offers excellent flexibility and durability that are consistent with natural rubber. It is environmentally age resistant in both hot and cold extreme environments.