Never let mail or important internal documents go astray. There?s no need to leave mail on people?s desks just slot it into the letter tray so everyone can have a tidy desk. These blue letter trays are part of the Avery DTR ECO Desktop Range made from sturdy blue 96% 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.