* FKM (viton type) seals. * PTFE self-lubricating stem bush ings and seats cannot stick or bind. * Precision molded in polypropylene. Polypropylene is reinforced with fiberglass for additional strength. * Self-aligning ball moves freely against the PTFE seats for smooth operation. The valve opens and closes with very little pressure on the handle. * Ball is diamond turned, after molding, to make it spherically perfect, which provides precise contact between ball and seats.
