Model B Perfect for classroom & meeting room facilities. Easy pull-down system locks at intervals to fit a variety of projection formats. Nylon bearings provide smooth quiet operation for the life of the screen. Case design allows for hanging from a ceiling or flush mounting to a wall. Features Screen surface may be angled with included 20 inch pull cord to eliminate keystoning when screen is mounted with extension wall brackets (optional) or suspended from the ceiling Camlok roller system prevents the screen fabric from being accidentally pulled from the roller Black masking borders are standard 22 gauge octagon embossed steel case, 2.75 inches in diameter, with baked enamel finish Matte White screen surface is seamless & ideal for front projection when ambient light is controllable Offers unlimited viewing angles & perfect uniformity while giving precise definition & reproduction of color or black & white Screen surface is washable with mild soap & water Flame retardant Mildew resistant Extension wall brackets (optional) are required for wall mounting or mounting screen across a corner Specs Viewing Angle: 50 degrees Gain: 1.0 Height: 70 inches Width: 70 inches