DT-Swiss Hub Service Parts. Features: 197mm hubs use 142mm endcaps, 190mm use 135mm endcaps, 177mm use 142mm endcaps, 170mm use 135mm endcaps, 157mm use 142mm endcaps, 150mm use 135mm endcaps and 148mm use 142mm endcaps Rock Shox Torque cap adaptor kits are a two piece endcap that replaces the existing single piece endcap on compatible hubs or wheels, and instruction can be found on their YouTube channel For converting back a Torque cap 350 hub to standard, you will need (1) DT-0630, (1) DT-0631 and (2) DT-0632 Instructions are available online @ www.dtswiss.com For any questions, please email info.US@dtswiss.com Specs: Model: 240/340/350/440FR Description: freehub body seal