Valves have stainless steel bolts and are made of precision molded polypropylene. Polypropylene is reinforced with fiberglass for additional strength. The self-aligning ball moves freely against the PTFE seats for smooth operation. The ball is diamond turned, after molding, to make it spherically perfect, which provides precise contact between ball and seats. They have PTFE self-lubricating stem bushings and seats and FKM body seals. Maximum operating pressure 100 psi. These are side load valves and they provide directional flow, right or left. Valve cannot be turned off.