... technology, environmental protection 3.High precision 300 Series Capillary Welded Stainless Steel Pipes1.)materialsCold rolled stainless steel band ,all the raw materials are from ... 5mm,Other sizes could be customized .We can do stainless steel pipe's deep-processing,such as Stamping,Punching holes, ... , Each batch of pipes through rigorous testing. 300 Series Capillary Welded Stainless Steel Pipes