Note: The picture is exactly what you are purchasing. This is one (1) rubber plug for floor jacks or bottle jacks. Plug is used for filler hole. This plug is 8mm (5/16inch). Plug for the Following Manufacturers: Sears, Craftsman, Grainger, Lincoln, Walker, Napa, Hein Werner, Ajax, Blackhawk, Mac Tools, Matco, John Deere, Ultra Pro, Snap-On.