Gas and oil drilling tools,drill pipes diameters :2 3/8-5 inch Grade:R780, ... ,X95,G105,S135 API 5DP Standard, ISO 9001-2000. oil and gas drilling tools,OD :2 3/8, 2 7/8, 3 ... 1/2, 4,4 1/2, 5inchGrade:E75,X95,G105,S135,R780drilling ... meeting API 5DP and ISO 9001:2008.4. Longway has the reasonable price in the market.Detailed images: Gas and oil drilling tools