Tama Starclassic B/B Birch/Bubinga PL62HXZS/TBT 6PCS Drum Shell Kit The Tama Starclassic Performer B/B created a premium quality union of birch and bubinga shells. The distinct and traditional sound of birch has made it the choice of many pro drummers for last thirty years. By using bubinga wood for the inner layers of a birch shell, this mixture of birch and bubinga has created a new sound with a sweeter and deeper tone which exhibits the focused attack of birch paired with the enhanced lows of bubinga. Shells (Bubinga + Birch) Tom Tom/Floor Tom are 4 ply birch +3 inner plies of Bubinga (6mm) Bass Drum is 5 ply birch + 3 inner plies of Bubinga (8mm) Star Cast Mounting System The Star-Cast Mounting System has always provided maximum resonance and stability for TAMA's pro-drums. A streamlined design makes it easier to position toms closer together for greater ease and comfort than ever before. In addition, a switch to aluminum provides lighter weight and even truer tonal vibration.