Material:Carbon SteelTechnics:CastingType:Cross, Tubing CrossoverPlace of Origin:Tianjin, China (Mainland)Model Number:1/8"-4", 1.9" to 4-1/2"Brand Name:DLPConnection:FemaleShape:ReducingHead Code:Square, round with threadProduct name:API 5CT Oilfield Drilling Tubing CrossoverStandard:APIApplication:Oil productionUsage:China petroleum EquipmentLength:As customer requirementSteel grade:J55, K55, N80, P110Outer Diameter:1.9 - 4.5 inchWe would like to establish long term business with any reliable partner in the world . Any interesting or questions, pls don't hesitate to contace us . Waiting for your kindly reply . Thanks