AV Stumpfl Monoblox Surface RP 4:3 325x249cmMonoblox Surface RP 4: 3 325x249cm Front. Rear. Dual. 3D. High Gain. Seamless. Perfect. Have you ever seen a projection screen with virtually invisible snaps on the border? We have it! Our PVC surfaces can be stretched easily and attached to the frame with snaps. The surface has to be perfect mat seamless and fit accurately to the projected image. Like all other AV Stumpfl projection screens Monoblox ships with a variety of different surface types. We