60" Diagonal 4:3 HD Pull Up Floor Projector Screen 48"x36" 1.3 Gain Home Projection w/Aluminum Case Telescoping pull up mechanism for quiet and easy operation Unique extension structure to allow screen stop at any desired position Heavy-duty and lightweight aluminum case for easier installation,standard 4-side black masking borders increase picture focus & contrast Premium matte white surface diffuses projected light uniformly,black-backed screen material eliminates light penetration Screen surface could wipe with mild detergent or water