With multiple coatings on both sides, this premium glass filter reduces VLF/ELF radiation by 99.9%. Eliminates static buildup and unwanted glare. Features a large mounting bracket for better stability. Flexible design offers full vertical adjustability. Meets AOA specifications. Made in the U.S.A. CRT Monitor Size Range: 19.00 in - 21.00 in; Maximum LCD Monitor Size Range: N/A.