How to Use: Take out the product and use it Specification: Item Type: 23.8 Inch Computer Screen Filter Product Material: PET Product Size: 23.8 Inches Aspect Ratio: 16:9 (Approx.527 x 296mm / 20.7 x 11.7in) Package List: 1 x 23.8 Inch Computer Screen Filter1 x Dust Free Cloth 1 x Plastic Tower Buckle 1 x Double Sided Tape 1 x User Manual