AV Stumpfl’s Monoblox surface RP 4:3 is a rear-projection surface supplied without the frame or stand. It has an overall size of 691 x 523 cm and a net projection area of 671 x 503 cm, with a 4:3 aspect ratio. The surface is identified by manufacturer article number BXF-RV691523A1D. Its surface gain code is R10 and its net weight is 17 kg.