Features 6 levels of storage. Traditional style. Plastic construction in black. Self-stacking design. Simple, clean lines go with any dÃ©cor. The Rubbermaid 86028 Six-Tier Regeneration Letter Tray offers six levels of storage, making it simple to organize letters and mail. Each tier of this letter tray has a slanted feature at the front that directs mail into the tray, and a scooped bottom that makes it easy to grasp and remove items.