Danco 7S-4D Stem Extension for Delta Faucets is specially designed to repair Delta Faucets when the shower valve faucet depth is incorrect due to a thick wall. This stem extension is compatible with both hot and cold water diverter applications, providing the necessary additional length for tub and shower stems. It a convenient solution without the need for a separate seat during installation, making it an effective way to extend the functionality of your Delta Faucets in various settings. Model Number: 18026B