27 Pack PM2.5 Activated Carbon Air Filters for Thunderbolt Air Purifier - Replaceable Filters for Home, Office & Allergy Relief

3M Privacy Filters allow you to work privately in public places. 3M privacy technology darkens on-screen data when viewed from the side and provide higher clarity than competitive filters. This 3M Privacy Filter is custom-cut for the Apple 27 inch Thunderbolt Display. The filter application system features an optically clear adhesive designed specifically for display screens. Testing proves that when kept clean filter can be repositioned hundreds of times.