This high quality Genuine OEM Alliance Shock Kit Assembly (803777P) absorbs the vibrations and movements of the outer tub . The Black Shock Kit Assembly replaces the following Part #: 803777. High quality Alliance OEM 803777P Commercial Laundry Appliance Shock Kit Assembly is compatible with the following brands: Alliance. Please be aware that it is recommended to use protective saftey equipment and disconnect the appliance from all utilities prior to installation of the Shock Kit Assembly.