Premier Drums Genista Series 43284BRXD 1-Piece Birch 24x18 Inches Bass Drum, Drum Set (Blaze Sparkle Lacquer) Internally lacquered 5.7mm 7-ply un-supported North American Maple shells, Flush-fit ISO mounts and 2.3mm triple-flange steel hoops. Hoops as standard. Internally lacquered 5.7mm 7-ply un-supported North American Birch shells, Flush-fit ISO mounts and 2.3mm triple-flange steel hoops. Hoops as standard. 24x18 Includes, (2) Premier 280030 Bass Drum Spurs Even-coat Lacquer Finish