AV Stumpfl Monoblox rear-projection surface for 4:3 projection. The surface has an overall size of 243 × 183 cm and a net projection area of 223 × 163 cm. It is supplied as the projection surface only; the Monoblox frame and stand are separate articles. The surface gain is identified by code R5. The product weighs 2.5 kg and is manufactured in Austria.