CROPPER HOPPER-The EXPO is an accordion style organizer for 12x12 paper. It is made of clear acid free polypropylene and is designed to hold papers without bending the corners. The case is divided into 13 sections and includes blank labels. This organizer will hold up to 200 sheets of 12x12 standard weight paper. The lid secures in back to stay out of the way when in use. Tuck tab closure keeps items from falling out.