Pyle PRJSM9406 Universal Pull-Down Manual Projection Screen (84 Inches Diagonal) • 4:3 viewing format;• Matte white projector screen ;• Auto-locking roll down feature ;• Adjustable screen height;• Screen can be adjusted/stopped at any point ;• Projection viewing surface easily pulls down and retracts;• Black masking border for optimum image focus and alignment;• 2 top loops that hook onto screws, nails, bolts, etc.;• Ceiling or wall installation;• Matte white projection fabric thickness: 4 mm (.157 in.);• 84 in. diagonal ;• 50.3 in. x 67.3 in.;