we can supply you with ss ERW pipe : OD 6mm—219mm                     material: 200series 300series 400series    all the pipe we can accord to AISI JIS DIN GB . pls contact me freely if you have any need and you will get good quality at a competitive price from us. We believe that we could be a good potential of yours, for we are in this line for more than 10years. Thank you.