SIZE RANGE: 1/2" TO 18" ,Material: Primarily stainless steel 304 (SS304) or 316/316L (SS316L) for high corrosion resistance. Gasket Materials:Typically EPDM (for water, -20°C to +100°C) or NBR/Nitrile (for oil/gas, -20°C to +80°C), with options for FKM/Viton for higher temperatures.