Drill pipe Specifications 1) OD: 2 7/8", 3 1/2", 4", 4 1/2", 5" 5-1/2"  2) Steel Grade: E75, X95, G105, S135 3) Type of end finish: EU-external upset, IEU-internal & external upset 4) All drill pipe are made according to API 5D 5) We can provide in many conditions, with or without hard banding (Arnco100, Arnco300, tungsten carbide etc). Please specify the following on enquiry: Outside Diameter Inside Diameter Steel Grade Length Internal Coating Material We are Hebei Zhankui Drilling Equipment Co.,Ltd in China,We are the supplier of tricone bits and PDC bits in China,we can design and produce PDC bits for you and we are the agent of tricone bits,we have built further cooperation with KINGDREAM,LILIN,CS and other big factories in China,please be assured that we can supply you the same good quality with better prices.  If you have interests to cooperate with us, do not hesitate to contact me,thanks.   MSN :  andysun555 @hotmiail.com