Avery DTR Eco Letter Tray A4/Foolscap Portrait Black Never let mail or important internal documents go astray. Thereís no need to leave mail on peopleís desks, just slot it into the letter tray so everyone can have a tidy desk. These black letter trays are part of the Avery DTR ECO Desktop Range, made from a sturdy black 100% recycled plastic. With their versatile stacking system using risers (sold separately), they also stack in reverse at 90∞ making them a perfect fit for your workspace. Ideal for organising your paperwork and files.