Our factory has been manufacturing seamless steel pipes since the year 1983, we can do many ranges of different pipes. The biggest OD we can do is 820mm, biggest WT is 65mm, the smallest WT we can do is 2mm. If you have interests, please feel free to contact us for any detail. We are glad to receive your email or fax. Email: hbxsd258@yahoo.com.cn MSN: hart926@hotmail.com Best Regards, Hart