Monoblox rear-projection surface from AV Stumpfl’s monoblox series, designed for a 4:3 image format. The surface has an overall size of 300 × 230 cm and a projection area of 280 × 210 cm. It uses the R10 surface specification and provides a 138-inch diagonal projection area. This product is supplied as the projection surface only; the corresponding frame and stand are separate articles.