Our company,Yantai RunKang Economic and Trade CO.,LTD. was founded in 1998, which is specialized in operating seamless steel pipe more than 10 years. Our main product is seamless steel tubes, with standard of ASTM A179, A192, b10, A213, A519, A106, A53; DIN 2391, DIN 1629, DIN17175; API value="5" hasspace="False" negative="False" numbertype="1" tcsc="0">5L, API 5CT; GB/T 8162, GB/T 8163, GB/T 3087, GB/T 5310, GB/T 9948,the diameter from 1/8 to 36 inches, the thickness from 5S to S160. Please visit our web site for more details. And we will provide you the high-quality products, best credit and excellent service.