1、COMPATIBLE: 20 inch computer screen filter is compatible with 20 inch monitors from for HP, for Dell, for Acer, for Asus, for ViewSonic and other brands. 2、CLEAR VIEW: Laptop filter appears dark when looking at the screen from a certain angle (angle of about 30° to 60°) but bright when looking directly at it, to change the private angle from 60° to 30° degrees, simply adjust the brightness levels of the monitor. 3、EYE PROTECTION: Computer screen filter protects your eyes by filtering 96% of UV rays and suppressing 65% of blue light, reversible, giving you the flexibility to choose between glossy or matte surfaces, choose matte to minimize external dazzing. 4、SCRATCH RESISTANT: Screen protector offers two mounting options that can be installed in approximately 30 seconds, PET material, anti dazzing and scratch resistant. 5、APPLICATIONS: Screen protector is perfect for maintaining screen private in high traffic areas such as open workspaces, airports, airplanes, coffee shops, office environments, financial institutions, and other public places. Item Type: Computer Screen Filter Material: PET Product Size: 20inch(442x249mm / 17.4x9.8in) 1 x Protective Film 1 x Dust Free Cloth 2 x Adhesive 12 x Double Sided Adhesive