Kohler Black Plastic Mixer Cap Kit for Rite-Temp Pressure Balancing Valves. It prevents scalding and freezing for a safe, comfortable water supply. Protect the warranty on Kohler products, always look for the Kohler Genuine Parts logo. Kohler Genuine Parts are designed by Kohler engineers to maintain original product performance and promote product longevity. Compatible with most rite-temp shower valves. Temperature limit stop provides temperature control for safety while allowing maximum water temperature. Provides smooth shower handle rotation. Designed to fit with Kohler trim.