CleverDelights size 7 rubber stoppers. 10 pack. Dimensions: 30mm x 37mm x 25mm tall (approx. 1 3/16" x 1 7/16" x 1"). General use hardware stoppers. Solid rubber stoppers, no hole. Tapered stoppers great for plugging containers, pipes, vials, stopping leaks, or using as equipment spacers. Made from natural rubber. Gray color. Durometer hardness is shore 65A. Size #7. Other sizes ranging from #0 to #13 also available in our store. Please see the additional pictures for a chart showing the sizes and specifications of all the rubber stoppers in our inventory.