6Mm I.D. Shrink Fit Guhring Modular 4 X 4 Flange Adaptor, 60Mm Flange Diameter, 70Mm Gage Length Designed For Optimal Ultra-Fine Machining Operations Using Guhring's 4 X 4 Modular Flange Adaptors Or Direct Mounting To Machine Spindle Providing Quick + Simple Ultra-Fine Axial & Radial Adjustment For Superior Concentricity And Alignment Error Compensation. Balanced To G6.3 / 15,000 Rpm. For Coolant Through The Tool Applications You Must Order Intermediate Coolant Supply Sleeve Series No. 4716 Separately | For Highly Accurate Alignment On Alignment Adaptors Or Machine Spindles | Cooling Lubricant Without Loss Or Flow Disruption Due To Use Of An Intermediate Tube | For Tool Shank Tolerance H6 | With Axial Dampening Screw For Optimal Concentricity. Series No. 4760, Order Code 006.0600. Made In Germany, Guhring Part #9047600060600