Seal and snap ring kits help keep the elements out and ensure your bearings continue to spin smoothly. Includes a snap ring and an outer seal for two bearings. PHS473 - 1" Also for ThreadFit 24, Press Fit 24, T47 24i, and T47 24x bottom brackets) PHS474 - 1-1/8" PHS475 - 1-1/4" Also for ThreadFit 30, Press Fit 30, T47 30i, and T47 30x bottom brackets) PHS640 - 1-1/2" Chris King bearing service instructions If you need a mixed set for tapered headsets, please contact our sales team info@chrisking.com