The really useful box compartment tray is perfect for storing your small items such as jewellery pieces gems earrings scrapbook embellishments building blocks and more use alone or with an empty really useful box the tray insert is an ideal way to organise your crafting essentials 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