Pro Series Stage II Billet Single Disk Torque Converter Converter Diameter - 258mm - 10 1/4" Available in stall speeds from 2500 - 3500 rpm Furnace Brazed Hand TIG Welded Turbine Hub Torrington Bearings Billet front and Billet Piston Deep Groove Ball Bearing Design for Longer Clutch Life Flanged Impeller Hub for Anti-Flex Durability Hand Assembled to Exacting Tolerances