... Product specification level:PSL1~PSL3G Material class:AA,BB,CC,DD,EE,FF PR1~PR2 Model:WellheadMaterial:AA,BB,CC,DD,EE,FFPressure:2000~20000PSIClass:Drill ... ,R,S,T,U,VPerformance requirements levelPR1,PR2Material-level productsAA,BB,CC,DD,EE,FFApply MEDIAOil, gas, mud, etc API 6A wellhead ...