... -5 inch API 5DP Drill Pipe/Oilfield Drilling Tools: Grade:DZ50,G105,S135,R780 OD:42-127mm Length:R1-R3 Upset:IU,EU,IEU ... Product Details:2 3/8-5 inch API 5DP Drill Pipe/Oilfield Drilling Tools :Grade: DZ50 ... ,R780,E75,X95,G105,S135Material:40Cr,45Mn2,35CrMo,4137HApplication: Drill pipe Technique:Welded ...