Type C polypropylene cam and groove fittings include a female cam x hose shank (hose barb). Type C camlock fittings are most often matched with Type E adapters of the same size, and can also be used Type, A, E, and F adapters, and Type DP dust plugs. Polypropylene (also called PP) is a thermoplastic material that resists UV, weathering, and corrosion. Type C polypropylene camlock couplings are used in petroleum production, reverse osmosis systems, and food processing.