Durable Polypropylene is glass filled for rugged strength and durability. Economical and superior in performance. Most complete line of polypropylene couplings available. Maximum operating pressure 300 PSI. Precision molded insures uniform and accurate fit. Smooth operating finger rings are designed for easy opening of cam levers. Versatile interchangeable with all types of cam lever couplers. WARNING: Couplings should not be disconnected under pressure or with liquid in the line.