The General Pump Y60181031 replaces a leaky or damaged unloader inside pressure trapping unloaders. It fits models YU4050K, YU4050KDM, YU5075K, YU5075KMM, and YVB5121B. Made with a brass construction. Dimensions measure 10.3x23.4x12.5. This is a genuine OEM part designed to ensure a proper fit when install inside the recommended unloader models.