Darkens side view to prevent others from reading your monitor * Protects 24 inch widescreen laptop or flat panel screen from dust, fingerprints and scratches * Reduces screen glare to help prevent eye strain 100% recyclable * Easy to attach and remove * Measure height, width, and diagonal viewing area of your monitor to ensure a proper fit * Diagonal viewing area: 24 inches * Filter viewing area: 12-7/8 inches x 20-1/2 inches (H x W)