This ISO Compliant filter reduces screen glare by up to 99% to help prevent eyestrain, meeting the American Optometric Association (AOA) specifications. The light-tint glass provides sharper text and brighter graphics. Properly grounded, the frame also lessens static charging. Assembly-free frame fits easily on your monitor. LCD Monitor Size Range [Min]: 19″; LCD Monitor Size Range [Max]: 20″; ; Frame Type: Flat Frame.