Bi-Office Ultrabite Magnetic Lockable Whiteboard Display Case Yellow Aluminium Frame 6 x A4 720x674mm - VT6201601511 DDBi Office Ultrabrite lockable display cases have a highly visible aluminium yellow frame, ideal for an industrial environment to display and highlight important information or safety instructions, as well as keep the documents saved from dust or water splashes. The magnetic lacquered steel surface means that you can attach your notices with a simple magnet and when you remove it, its as good as new. It's lockable, strong, and lightweight solution.