8-1/8 OD x 17-1/2 OD Oversized Cutlipped Guide with Speci

8-1/8 OD x 17-1/2 OD Oversized Cutlipped Guide with Special I.D. (BLANK) fordressing with Tungsten to mill 4-1/2 O.D. (9226) f/ Logan Series 150 Overshot.