1.Stainless Steel Reducers 2.Standard JIS, AISI, ASTM, GB, DIN, EN 3. ... , WP317L, WP321, WP321H, WP347, WP347H, 904L etc. Nickel Copper, Carbon Steel, Low Alloy Steel, Alloy Steel Dimension: Seamless: 1/2” to 20” (DN15 ~DN500 ... ” to 48” (DN15~DN1200) Wall Thickness: SCH5S to SCH160 Stainless Steel Reducer pipe fittings