Snap Frame Security - Fire proof, A3, 32.8 x 45.1 x 1.2 cm Certified in accordance with fire protection class B1 (German standard DIN 4102), of low flammability. Material and colour of the frame: Aluminium, silver anodized, mitre cut. Clamping profile technique for easy and quick change of the inlays. Anti-reflex protective film (PP) with UV-filter, back made of polystyrene, including screws and dowels.