The Cleveland 62453 Extension Probe extends the reach of a water-level sensing assembly inside compatible commercial steam equipment. Its purpose is to position the connected water probe farther into the vessel, allowing the sensing point to reach the required measurement area. The extension measures approximately 4.625 inches long with a 1/2-inch diameter and connects to the existing... https://partsfe.com/extension-probe-4-for-cleveland-part-62453