Stainless steel rings, arms &mdash: pins. Most complete line of polypropylene couplings available. Versatile &mdash: interchangeable with all types of cam lever couplers. Precision molded &mdash: insures &mdash: uniform and accurate fit. Durable &mdash: Polypropylene is glass filled for rugged strength and durability. Smooth operating &mdash: finger rings are designed for easy opening of cam levers. Complete series of ½"", ¾"", 1"", 1¼"", 1½"", 2"", 3"" and 4"" NPT thread. Maximum operating pressur 225 psi Economical and superior in performance. Standard with EPDM gaskets. Buna N, and FKM also available. WARNING: Couplings should not be disconnected under pressure or with liquid in the line.