tender for set of stainless steel pipes consisting of 3 types of pipe:-. 1.stainlesssteel seamless pipe grade 304:- make jindle or similar 28 mm od x 24 mm id, length-20 ft.2.stainless steel seamless pipe grade 304:- make jindle or similar 19 mm od x 15 mm id,length-20 ft. 3.stainless steel seamless pipe grade 304:- make jindle or similar 25 mmod x 21 mm id, length-20 ft .