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
Kohler K-GP77759 MIXER CAP FOR PRESSURE BALANCE 1/2" SHOWER VALVE, No Size, Black - Amazon.com
Kohler Mixer Cap for Coralais Pressure Balance Valve GP77886
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
KOHLER 1 in. Mixer Cap for Pressure Balancing Valve on Older-Style Coralais (Plastic Stem) GP71969 - The Home Depot
Kohler RGP77759 Mixer Cap for Pressure Balance 1/2" Valve - The Family Flips