The slim 4mm deep quality finished aluminium frame of this Quartet Penrite Slimline Premium Whiteboard is lightweight but sturdy and features a low profile edge. The smooth edges and clean lines take up less space than traditional whiteboards and are perfect for creating a sleek, minimalist designed space, the design sits flush with the wall with no visible mounting hardware. You can even connect your other Quartet boards side by side creating an endless, commercial grade, magnetic and dry-erase surface for collaboration.