Type: Concentric & Eccentric Reducer Size: 1/2 inch to 80 inch Wall thickness: 2 mm to 100 mm Material: 1)Carbon steel: ASTM A234 WPB/C, A420 WPL6, WPL3, WPHY52, WPHY60 etc. 2)Stailess steel: ASTM A403 WP304, 304L, 316, 316L, WP321 etc 3)Alloy steel: ASTM A234 WP11, WP22, WP5, WP9, WP91 etc. Standard: ANSI B16.9, DIN, BS, JIS, API etc.