duct pipe fittings elbows welded fitting Sizes:1/2''-48'' Thickness: sch5s-sch160 Grade:304 304L 316l 321 duct pipe fittings elbows welded fitting Sizes:1/2''-48'' Thickness: sch5s-sch160 Grade:304 304L 316l 321duct pipe fittings elbows welded fittingSizes:1/2''-48''Thickness: sch5s-sch160Grade:304 304L 316 316l 321Standard: GB,ASME/ANSI, DIN, JISPacking:wooden crateAlso non-standard ...