Sk-40 Ad/B High Precision Modular 4 X 4 Alignment Adapter, 70Mm Mounting Flange Diameter, 50Mm Gage Length Provides Quick + Simple Ultra-Fine Axial & Radial Adjustment For Superior Concentricity & Alignment Error Compensation. Designed For Optimal Ultra-Fine Machining Operations Using Guhring's 4 X 4 Modular Hydraulic Chuck Flanges, Shrink Fit Flanges Or Hsk Adaptor Flanges | Sk To Din Iso 7388-1 Form Ad/Af | Balanced To G6.3 / 15,000 Rpm | Suitable For Mql & Conventional Cooling | For Coolant Through The Tool Applications You Must Order Intermediate Coolant Supply Sleeve Series No. 4716 Separately | For Highly Accurate Alignment Of All Modular Flanges 4 X 4 | Cooling Lubricant Without Loss Or Flow Disruption Due To Use Of An Intermediate Tube. Series No. 4724, Order Code 070.0400. Made In Germany, Guhring Part #9047240700400