The Epstein Cymbelt Posts allow the use of the Cymbelt with suspension or hoop mounted concert bass drums. It’s easy to swap out the Cymbelt washer and nut for the Post with and replacement felt washer and nut. These are available in 4 size options. To determine which Post is needed, simply measure from the top of the shell to the top of the hoop, subtract 1/2 inch (to allow for the Cymbelt) and determine the size Post you need.