This high quality foam board from West Design is rigid and strong. It is designed to be easy to cut and achieve crisp, clean edges, making it ideal for mounting, backing, modelling, framing and more. The foam core is covered with acid-free paper, making this board long-lasting and providing a smooth, sturdy surface. This board is 3mm thick, making it both lightweight and robust. 6 sizes of this durable board are available, so you are certain to find the ideal size for your project. The foam board comes in boxes of 15 to 40 sheets, depending on your chosen dimensions. - Surface texture: Smooth - Acid free: Yes - Product dimensions: 76.2 x 50.8 x 0.3cm - Page size: 20inches x 30 inches - Brand: West Design - Sub Brand: Westfoam - Surface pattern: Plain - Thickness: 3mm - Colour: White - Rigidity: Rigid - Main material: Polystyrene - Used for: Mounting prints, as a backing material, modelling, framing - Number of pieces: 40