THERMOSTATIC CONTROL: Precise thermostatic control allows users to set and maintain a specific water temperature. It prevents sudden fluctuations in water temperature, ensuring consistent comfort and safety, which is especially important in environments with varying water pressures APPLICABLE MODELS: The Bathroom Cartridge Only for thermostatic valve A4910 A4913BO A4917 and A4717 remove with 17mm or 11/16" open jaw wrench OPERATIONAL SMOOTH: Designed for efficiency, the cartridge facilitates smooth operation of the thermostatic shower system. It enables quick adjustments to water temperature and flow rate, enhancing user convenience and satisfaction during showering HIGH-QUALITY CONSTRUCTION: Our shower thermostatic valve cartridge is made of high-quality Brass, and its sturdy structure can withstand the wear and tear of daily use EASY TO INSTALL: Our shower cartridge replacement is very easy to install and can be installed without the assistance of a professional Cartridge Replacement for Rohl C7912 Thermostatic Cartridge, Fits for A4910 and A4913 Shower Valves