The Fellowes® Partition Additions™ Waterfall Sorter is ideal for organizing your most important projects! Five transparent sleeves keep files visually accessible, while the stepped design makes it easy to organize and prioritize documents. Each sleeve holds up to 15 sheets and accommodates most document sizes. Sleeves are open at the top and a single side for ease of use. Innovative ViperPin™ technology attaches to any tackable surface. Securely holds up to 5 lbs. without damaging mounting surface. Mounts vertically or horizontally.