Type Other Machine Type Drilling Equipment Certification API Processing Type Casting Use Well Drilling Material Stainless Steel We also welcome OEM and ODM.TDC Casing Slip-Loc Head Size: 11" to 21-1/ 4" Working Pressure: 2000 to 10000 psi Temp. : -60 Dec. C. to 121 Deg. C (K,U) Material: AA to FF PSL: 1 to 4 PR: 1 to 2