10 pack of rubber piano cabinet buttons/bumpers.  Brown.  Steinway style with flat, knurled top. Top is 1/2" diameter and 1/8" tall.  Stem fits in a 5/16" diameter hole at least 11/32" deep.

I've been in the piano business 30+ years and am glad to help before or after the sale if you have questions regarding this item.  My contact info is included with each shipment and you can also reach me through eBay.