Kohler RGP77759 Mixer Cap for Pressure Balance 1/2" Valve - The Family Flips
Mixer Jar Cap
GP77886 Mixer Cap and GP800820 Pressure Balancing Unit Assembly,Compatible with Kohler K-GP77886 Faucet Valves and k-304 and k-11748 Platforms - Amazon.com
Amazon.com: GP76851 Mixer Cap and Pressure Balancing Unit (Shower) Parts Cartridge Compatible with Kohler, Replacement for Rite-Temp and 1/2" Shower Valve GP500520 and GP77759 Parts After Market Replacement : Automotive