This deluxe ATA effects rack protects up to 4U of your valuable rack mount gear. Features include dual rack rails (front and rear), stackable ball corners, heavy-duty rubber feet, Two spring-loaded handles (one on each side), and removable front and rear covers. Built to last! Interior Depth (rail to rail): 12. 375". Interior Depth (rail to cover): 15. 875". (For more information about this product and other Odyssey products visit our website at www. Odyssey gear).