Stackable letter tray offers an innovative design to stack vertically or staggered. Raised entry and inclined back make it easy to insert and retrieve documents. Wide lateral strengthening sections have two location notches for stacking vertically or in stepped formation. Identification label zone on the front allows you to identify each tray with self-adhesive labels (sold separately). Letter tray holds up to 500 sheets and accepts sizes up to A4 and files up to 9-1/2" x 12-1/2" (24 cm x 32 cm). Extra high sides (2-2/5" or 61mm) create 22 percent more capacity when compared to ordinary letter trays. Shock-resistant polystyrene has a high-gloss Poli-glaze surface and is 100 percent recyclable.