Stainless Steel: ASTM A403 WP 304/ 304L/ 304H/316/ 316L/ 317/ 317L/ 321/ 310/ 347/904L etc. Carbon Steel: ASTM A234 WPB/A420 WPL3/A420 WPL6/ MSS-SP-75 WPHY 42/46/52 / 56/60/65/70 Alloy Steel: ASTM A234 WP1/WP5/WP9/ WP11/WP22/WP91 etc. Types: Elbow, Tee, Reducer, Return Bends, Stub-Ends, Cap, Collar, Cross, Insert etc. Size: 1/4" NB TO 32" NB. (Seamless & Welded) Class: Sch. 5S To Sch. XXS.