The company specializes in producing stainless steel pipes, the main material: 304,304 L, 301,321 ... AF316L, 2520 and so on. The company specializes in producing stainless steel pipes, the main material: 304,304 L, 301,321 ... 20*20 - 120*120 , the thickness is 1.5-10. Welcomed the call letters ordering!Every material square tube20*20 ... 100*5----1050*50*3-----5120*120*6----10 304 stainless steel square pipe