0.40Mm Width, 1.5Mm Min Bore, Guhring Rh Straight Groove I.D. System 104 Insert, 7Mm Reach, Uncoated 0.40Mm Width, 0.40Mm Depth, 7Mm Reach Ge104.0040.000.07.15.R, Uncoated Type Ge104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Internal Grooving Straight Slots. Guhring Series No. 25130 Order Code 4.004 Made In Germany, Guhring Part #9251300040040 Guhring Inc.