Buy Steel Pipes 1.Product Description API 5CT Seamless Carbon Steel Casing Grade K55 ARE WIDELY USED IN THE PROJECTS FOR WATER, OIL, GAS WELL DRILLING,OUR FACTORY IS API 5CT CERTIFICATED, AND EQIUPED WITH MORDEN FACILITIES, SO, THE QUALITY OF PRODUCTS IS GUARANTEED. 2.Product website:http://www.kerlimar.net/steel-pipes/