Features: 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. specification:Item Type: Computer Screen Filter Material: PET Product Size: 20inch(442x249mm / 17.4x9.8in) PackageList: 1 x Protective Film 1 x DustFreeCloth 2 xAdhesive 12 x Double SidedAdhesive NoteAll data are measured manually, and there are certain errors in the measurement results.