5-3/4 O.D. High Pressure Pack-Off Assembly for 4-1/2 O.D.,

5-3/4 O.D. High Pressure Pack-Off Assembly for 4-1/2 O.D., with Chevron Packing, with Special Top Sub Threads for use with Pn. A1035-HP-001 Top Subs with Acme Threads.F/ Logan Series 150 Overshot.