GP800881 Pressure Balance Cartridge Replacement Compatible with Kohler Shower Valves for Rite-Temp and K-8304 Shower Valves Remember to Lubricate all the O Ring Rubber Parts Before Installing, To Remove Limescale From Inside and Outside, Avoid Leakage Caused by Scale Features: Solve leakage and dripping and cold and hot water mismatch problem Control pressure,Adjust temperature Specifications: Material: Plastic Color: Black