12Mm I.D. Guhring Shrink Fit Modular 6 X 6 Flange Adaptor, 60Mm Flange Diameter, 70Mm Gage Length Designed For Optimal Ultra-Fine Machining Operations Using Guhring's 6 X 6 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. 4717, Order Code 012.0600. Made In Germany, Guhring Part #9047170120600