Check the listing for details. For Kohler Rite-Temp Tub Shower Pressure Balancing Cartridge Repair Kit GP76851. Condition: New. Listed at 19.12 USD. 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 Product description Consists of the parts replace for the #GP500520 and #GP77759 Includes cartridge and cap for 1/2" valve Controls pressure and regulates temperature to ensure a gracious shower experience Do not rotate the Cartridge, just put it in, otherwise the O-ring will shift and cause leakage. Please note it is an aftermarket replacement. Replacement for the model#GP500520 and GP77759 for 1/2" Shower Valve, AND Controls pressure and regulates temperature to ensure a gracious shower experience. For leakage 1.O-ring is the key, must be replaced, and add lubricant, then firmly placed in the correct position. 2. Do not rotate the Cartridge, just put it in, otherwise the O-ring will shift and cause leakage. 3. Tighten the screws to fix the cap and the Cartridge, or will also cause leakage.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 Product description Consists of the parts replace for the #GP500520 and #GP77759 Includes cartridge and cap for 1/2" valve Controls pressure and regulates temperature to ensure a gracious shower experience Do not rotate the Cartridge, just put it in, otherwise the O-ring will shift and cause leakage. Please note it is an aftermarket replacement. Replacement for the model#GP500520 and GP77759 for 1/2" Shower Valve, AND Controls pressure and regulates temperature to ensure a gracious shower experience. For leakage 1.O-ring is the key, must be replaced, and add lubricant, then firmly placed in the correct position. 2. Do not rotate the Cartridge, just put it in, otherwise the O-ring will shift and cause leakage. 3. Tighten the screws to fix the cap and the Cartridge, or will also cause leakage.