3.0Mm Min Bore Guhring Boring/Profiling Rh System 104 Insert, 0.20Mm (T-Max) Offset, 7Mm Reach, Uncoated Right Hand, 0.20Mm Radius, Bright Uncoated Gt104.2026.020.07.30.R, Uncoated Type Gt104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Boring & Profiling. Guhring Series No. 25080 Order Code 4.009 Made In Germany, Guhring Part #9250800040090 Guhring Inc.