Raw Maple 5ply toms and 7ply bass drum shell. The new Keller Magnum series of shells offer thicker maple plies and thinner glue areas. More wood and less glue content gives increased overall resonance. This shell back includes the following shell sizes : 9x13, 16x16, 16x18, 18x22 (we can supply the bass drum at any depth from 14 up to the full 24 deep tube). All shell will ship un-drilled, unless you contact us to add custom drilling for your project. This shell pack DOES include bearing edge cutting. LIMITED STOCK WILL SELL OUT FAST.