a storage box includes a rigid enclosing housing having a front opening and two separate left and right plates positioned against the left and right walls of the housing . the left and right plates are provided with vertically spaced and horizontally aligned racks . a sliding door is slideably held in the guide rails provided in the left and right plates which extend adjacent to the top and rear walls of the housing and which permit the door to be drawn to the front side of the housing to cover the front opening .