... 9001:2000 good quality at the best price . Product Name : stainless steel pipe Standard: GB&ASTM 201 ,202 ,301 ,304 ,304L ,316 ... : WT : 1-60mm OD :3-320 mmPacking : in bundle by belt ,beveled ends ,painted ,plastic caps ,mark on the pipe Payment ... don’t hesitate to contact me at yourself .Thanks : 304 stainless steel tubes