... , 2520 and so on. The company specializes in producing stainless steel pipes, the main material: 304,304 L, 301,321, AF316L ... complete, diameter: 20*20 - 120*120 , the thickness is 1.5-10. Welcomed the call letters ordering! Every material square tube20 ... *20*1.5---360*60*4------625*25*1.5----370*70*4------630*30*1.5----480*80*4------840 ...