8-1/4 O.D. Top Sub furnished with 4-1/2 API I.F. Box Top C

8-1/4 O.D. Top Sub furnished with 4-1/2 API I.F. Box Top Connection, with 6-1/4 OD x 24 Long Fishing Neck with OD bevel diameter between 5-29/32 to 6-1/32 (38940)F/Logan Series 70 Overshot.