Ideal for large size conference or training rooms. Permanently lubricated steel ball bearings combined with nylon bushings and heavy-duty spring assembly offers smooth operation even in demanding applications. Matte White fabric up to and including 10" high will be seamless. Video Spectra 1.5, High Contrast Matte White and Silver Matte fabric up to and including 8" high will be seamless. High Power fabric up to and including 6" high will be seamless.Da-Lite"s wide selection of manual wall and ceiling screens gives the presenter a professional solution for any projection application or situation. All screens incorporate Da-Lite"s exclusive Camlok roller system that prevents the screen from being accidentally pulled from the roller. All screens come with black masking borders as standard. Matte White: The most versatile screen surface and the premier choice when ambient light is controllable. It evenly distributes light over a wide viewing area while colors remain bright and life-like, with no shifts in hue. Flame retardant and mildew resistant. Viewing Angle: 60° Gain: 1.