The Bullnose Window Board is a perfect, no-frills option for those that appreciate the simple things. We use the best MDF we can get our hands on to manufacture these items - it's moisture resistant and super high density resulting in a fantastic finish. Cannot be used externally - for internal use only. This window board is 350mm in depth, 25mm in thickness and 4200mm in length. It has a white primed finish and does not feature a tongue. Details: Profile Size: 1 edge fully bullnosed. Size: Product sold in lengths 600mm - 4200mm in sizes 150mm - 400mm (widths). The thickness can be 18mm or 25mm. If you require a bespoke window board / sill size, just let us know. We can pretty much do any size you require (excluding thickness). Finish: The primed finish will require an undercoat and final paint finish. The undercoated finish may require a final paint finish. Tongue: If you need a tongue at the back of the board, get in touch before placing your order.