3-3/4 O.D. Top Sub with 2-7/8 PH6 7.90# Box with 2 ID Bor

3-3/4 O.D. Top Sub with 2-7/8 PH6 7.90# Box with 2 ID Bore and with O-Ring Groove on Pin Thread for High Pressure Pack-Off AssemblyF/Logan Series 150 Overshot