4-1/2 OD Top Sub (undersized from 4-11/16 OD) with 3-3/4

4-1/2 OD Top Sub (undersized from 4-11/16 OD) with 3-3/4 OD x 20 Long Fishing Neck with 2-3/8 IF Box Connection. Made from Custom 465 Stainless Material. (9110)f/ Series 150 Overshot