... 2.Standard JIS, AISI, ASTM, GB, DIN, EN 3.Thickness SCH5S to SCH160 Concentric Reducer (CON. RED.), Eccentric Reducer ( ECC. RED.) Executive Standard ... /T21635 ,HG/T21631 etc. Material: WP304, WP304L, WP304/304L, WP316, WP316L, WP316/WP316L, WP317L, WP321, WP321H, WP347, WP347H, 904L etc. Nickel Copper ...