Monoblox rear-projection surface from AV Stumpfl’s Monoblox series, designed for a 4:3 aspect ratio and featuring the R5 S surface specification. The overall screen size is 427 x 320 cm, with a net projection area of 407 x 300 cm. The projection surface is supplied separately; the compatible frame and stand are separate articles. The listed net weight is 5.8 kg, and the manufacturer article number is BXF-RO427320A0S.