Self-stacking style in sturdy plastic helps contain desktop clutter. Simple, clean lines go with any décor. Ideal for office use, the Rubbermaid Regeneration Plastic Letter Tray Six Pack is designed to hold A4 documents and folders. This self-stacking set of trays contains 25-percent post-consumer recycled content and 25-percent total recycled content. Pack of six self-stacking A4 letter trays.