1.00Mm Width, 4.0Mm Min Bore, Guhring Rh Full Radius I.D. Groove System 104 Insert, 32Mm Reach, Nano-A Coated 1.00Mm Width, 1.00Mm Depth, 32Mm Reach Ge104.0100.050.32.40.R, Nano-A Coated Type Ge104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Internal Grooving Full Radius Slots. Guhring Series No. 25134 Order Code 4.009 Made In Germany, Guhring Part #9251340040090 Guhring Inc.