8 O.D. Adapter Sub furnished with 4-1/2 I.F. Box (with 36

8 O.D. Adapter Sub furnished with 4-1/2 I.F. Box (with 36 Long Fishing Neck) Top Connection with Drilco Boreback and shot peened threads. Bevel diameter to be 6-5/32 with 3 Mill Slots.f/ Logan Spear Packoff Assembly.