AHEAD Armor Cases begin with their unique shape. Featuring Revolution’s patented TruForm™ design, the shape of each case corresponds to the “true” shape of the drum plus its mounting hardware. The universal teardrop design allows for a much snugger drum fit. It also allows dealers to reduce their inventory by eliminating the need to double-stock separate cases for toms with and without suspension mounts and bass drums with and without tom mounts. For use with our 12″ x 18″ Travel Bass Drums.