EYE PROTECTION: This computer screen filter blocks harmful blue light at wavelengths between 380–420 nm. Advanced blue light blocking technology protects your eyes, sleep, and skin from the negative effects of overexposure to blue light. APPLICABLE: The computer screen filter is compatible with 22-inch (475x297.5 mm) computer screens. Perfect for students, office workers, gamers, and programmers in their offices and homes. PET MATERIAL: The 22-inch computer screen filter is made of highly transparent PET, which can effectively prevent dust and scratches on the screen for comprehensive HEV protection. PROTECTS YOUR HEALTH: The 22-inch computer screen protector film gives you better sleep, blue light blocker for your eyes, and protects your health. EASY TO INSTALL: The computer screen filter is easy to install and bubble-free. After cleaning the screen, simply remove the film on both sides of the computer screen's blue light blocker. Simply attach it. Item Type: 22 inch Computer Screen Filter Material: PET Size: Approx. 475x297.5mm / 18.70x11.71in Package List: 1 x Protective Film 1 x Dust Wipe 2 x Adhesive Tape 12 x Double-Sided Tape