2-3 Weeks. The 8-ply birch/mahogany shells are made using our unique Air-Seal System process. The combination of materials and manufacturing process give our concert bass drums a focused tone with strong attack, and provide unmatched durability. Comes with FiberSkyn 3 heads, and your choice of optional concert bass drum stands: BS-125, BS-425, or BS-751. (BS-751 shown). Black finish only.