The company specializes in producing stainless square pipe, the main material: 304,304 L, 301,321, AF316L, 2520 l... The company specializes in producing stainless square pipe, the main material: 304,304 L, 301,321, AF316L, 2520 and so on.The specification as follows: Stainless steel square pipe20*20*1.5-360*60*4-625*25*1.5-370*70*4-630*30*1.5-480*80*4-840*40*2-4100*100*5-1050*50*3-5120*120*6-10