API 6A casing head working pressure: 2000~5000psi nominal size: 7"~13 5/8" connect: BTC,LCSG,CSG,WST,weld, slip side outlet Casing ... annular seals, control line porting and test ports.Features:Size: 9 ~ 21-1/4Working Pressure: 2,000 thru 10,000 psiTemp ... (K,U)Material: AA thru FFPSL: 1 ~ 4PR: 1 ~ 2 API 6A casing head