Universal Radiator Adapter Compact universal alternative to application specific adapters required for pressure testing . Replaces more than 20 individual cooling system pressure test adapters for cars, vans, light and heavy-duty trucks . Patent-pending cam mechanism ensures an air-tight seal with radiator and coolant bottle necks . Compatible with Stant-style cooling system pressure pumps . Compact one-piece design fits conveniently in tool box . Applications: Compact universal alternative to application specific adapters required for pressure testing automotive cooling systems MV4508