Mapex's Qualifier Series Marching Bass Drums are lightweight, quality drums perfect for your developing marching ensemble. Constructed with a consistent 14-inch shell depth across all drum sizes, each bass drum features a birch inner and maple outer ply shell with wood hoops. Each bass drum has high-strength cast aluminum lugs and heavy-duty tension rods that are built for the stress of high-tension tunings. The Qualifier bass drums are available with Gloss Chrome hardware finish.