The foam gasket plus two roller latches in the door maintain a tight seal for proper drying conditions and the clear door disappears neatly under the unit when opened. Strong high-impact polystyrene allows you to stack up to five cabinets. A jar of silica gel, for moisture absorption, is included. Size: 9 1/4″L x 8 7/8″W x 6 5/8″H; inner dimensions 8 1/4″L x 7″W x 5″H.