Carl's DIY ALR Ambient Light Rejecting Projector Screen Material (16:9 | 105x187-in | 214-in Diag. | Rolled) 4K Ultra HD Ready, Front Projection, High Contrast Gray/Grey Cut Cloth, Active 3D, 1.5 Gain Multiple sizes and affordable prices of pre-cut material for your custom designed projection screen are offered, including the popular 135-inch Diagonal cut making it perfect for home theaters, media rooms, conference rooms, sports bars and more Ambient Light Rejecting (ALR) Projector Screen Material is the absolute best solution when you have little to no control over ambient light concerns! Beautifully handles a dark, low or moderately lit environment. Provides high contrast, vibrant color, HD, 3D images and is 4K Ultra HD/HDR Ready it almost does it all! Indoor use on a tension-mounted fixed frame is recommended for best results (pull tight like an artist canvas) This front projection screen material has an extra high gain of 1.5 for bright vivid color and offers up to 3 times the contrast of Carls FlexiWhite and up to 4x the contrast of Carls Blackout Cloth Its smooth texture provides sharp, crisp, clear high-definition, 4K Ultra HD, and HDR Ready images and it's fully compatible with Active 3D and Passive 3D with maximum polarization levels ALR has a dark, pewter gray/high contrast grey, color neutral, high performance surface allowing you to see both fine detail in dark scenes and also bright, vibrant colors in brighter scenes. Its high contrast and reflective surface reflects more light towards your eye and intensifies image quality. Our industry grade ALR reflects up to 76% of ambient light and has a viewing cone/seating angle 80 (40 Left/Right)