78691 Features: -Designed for permanent mounting to the wall or in a wall opening..-Front or rear projection surfaces snap easily on to the front of the black powder coated aluminum frame..-Flat back and sides for easy installation..-Provides a perfectly flat viewing surface for graphic and data video projection.. Screen Material: Cinema Vision A unique non-supported vinyl fabric that offers a bright, uniform image with no color shift at any viewing angle. This surface is designed to provide a higher amount of brightness for lower output projector types such as CRT. Its increased reflectivity will help enhance the image brightness in situations where a low level of ambient light is present. This surface is a good choice when producing video images. Screen surface can be cleaned with mild soap and water. Flame retardant and mildew resistant. Viewing Angle: 45 Gain: 1.3