... factories as the pipe material.2)We have more than 15 years experience in stainless steel market,a professional manufacturer.3 ... .Product Size: Round pipe:O.D.:9.5,12.7,15.9,17,18,19.1,20,21,22,23,25 ... to 6000mm. Square pipe:Side length:10*10,12*12,15*15,18*18,19*19,20*20,22*22,23*11 ... *23,48*48,50*50,20*10,25*13,30*15,38*25,40*10,40*20,50*25,60*30 ...