Our factory is professional producer of Seamlees Carbon Steel Pipes according to ASTM A106/A53, API 5L, 5CT, GB. Size range is from 1/4" up to 24". If any need, contact me please. Low price and good quality, i can assure you! Mandy YangMobile: 0086-15931758647 Tel: 0086-317-6839111 MSN&E-mail: ***** Yahoo Mail: *****