* Precision molded in glass reinforced polypro, for strength and chemical resistance. * PTFE seats for smooth operation and proper sealing characteristics. * EPDM O-Rings to handle most fertilizers and many chemicals. FKM (Viton type) available. * Double O-Rings in stem area for extra sealing protection. * Interlocking body and end plate to allow easy thread connection when installing valves. * Maximum operating pressure 100 PSI @ 70_ F.