Oster OS4900 Blender Part, Small, Gray Includes: 2 sealing rings Fits around the base of blender blade plate Can be used with most oster blenders Refresh and revive your Oster blender Add years to the life of your oster blender Blender gasket fits around the top side of the cutter assembly Package Contents: Rubber gasket Number of pieces: 2 Blender gasket fits around the top side of the cutter assembly Package Contents: Rubber gasket