SPI: SPI-Style 2-piece Bookcase Counter Storage Tray, Qty One (1) SPI's 2-piece bookcase counter tray with 20 tray compartments Reasonably secure, but must be taped or rubber-banded to be truly spill-proof; 2pc design allows good sorting & use during play Fits larger bookcase boxes like SPI's; does not fit narrower boxes (like Avalon Hill's)