We produce the stainless steel tubes with the specifications of 6-530*0.5-12mm under the standards of ASTM,JIS DIN,GOST9941-81,GB These products are used in many kind of parts like chemical industry,boiled and heat exchanger,petroleum,pharmacy,eletric power,shipping and so on We'll communicate clearly and honestly, deliver goods on time and respond to your feedback and comments. Trust us means trust your choice.Thanks,if you want to connect us,this is goff0127 at hotmail dot com and the elyqin at yahoo dot cn.