Versa-Dome Diaphragm Get the diaphragm that lasts up to 300% longer than standard diaphragms. Versa-Matic's Versa-Dome Diaphragms have a simple, smooth dome shape that delivers the flex across the entire face of the diaphragm, resulting in longer life. And they're so flexible, they can be installed and removed without the use of pry bars.