The really useful box compartment tray is perfect for storing your small items such as pens rubbers stray clips and other stationery use alone or with an empty really useful box the tray insert is an ideal way to organise your office necessities by colour type and projectmade out of a flexible plastic the tray is designed to fit into boxes up to 22 litres in size you can also insert them into the really useful storage towers from the office to home crafting keep your odds and ends off