0.80Mm Width, 3.0Mm Min Bore, Guhring Lh Full Radius I.D. Groove System 104 Insert, 12Mm Reach, Tin Coated 0.80Mm Width, 0.70Mm Depth, 12Mm Reach Ge104.0080.040.12.30.L, Tin 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. 25133 Order Code 4.002 Made In Germany, Guhring Part #9251330040020 Guhring Inc.