... oval 201 welding stainless steel decorative pipe a) Round tube and embossed tube : O. D. mm 9.5 , 12 ... .7 , 15.9 , 17 , 18 , 19. 1 , 20 , 21 , 22.2 , 23 , 25.4 , 28 , 31.8 , 33 ... 10 , 12*12 , 15*15 , 18*18 , 19 * 19 , 20*10 , 20*20 , 22* 22 , 23* 11 , 23 *23 , 24* 12 , 24*24 , ... , 9.6*15, 10*20, 13.5*18.5, 13*23, 10*25, 14.5*21.5, 15*28 ... 15*25, 15*30, 10*33, 15*35, 18*33, 23*31, 15*41, 17*45, 33.6*24, ...