Monarch universal lid for storage trays

Introducing the Monarch Monarch universal lid for storage traysThis clear lid clips securely onto the PP3501, PP3502, PP3505 and PP3506.It is translucent, allowing you to see what's inside easily while still protecting the contents of your storage from dust. Better still, the boxes can all be stacked with the lids on, allowing you to save on space with maximum efficiency!Clear lid for classroom storage trays, Translucent so you can see what's inside, Protect the contents of your storage trays from dust, Boxes can stack with lids on, Clips securely onto boxes, Box not included