1.5Mm Width Guhring Straight Face Groove Rh System 104 Insert, 3.0Mm Depth, 12Mm Reach, Nano-A Coated 1.5Mm Width, 3.0Mm Depth, 12Mm Reach Ga104.0150.005.12.40.R, Nano-A Coated Type Ga104 Guhring Micro-Precision System 104 Carbide Stick Straight Face Grooving Insert, 4Mm Minimum Circle Diameter. Guhring Series No. 25190 Order Code 4.003 Made In Germany, Guhring Part #9251900040030 Guhring Inc.