3M Privacy Filter for 21.5in Full Screen Monitor COMPLY Magnetic Attach, 16:9, PF215W9EM

Amazon

Effective black out privacy from side views outside the 60-degree viewing angle 3M COMPLY Magnetic Attach enables you to quick-click between world-class privacy and screen sharing thanks to ultra strong magnets that click the filter securely into place Matte surface helps reduce glare and fingerprints Helps reduce blue light, without distorting the natural color of your display Durable privacy filter that can withstand hundreds of cleanings

Euroffice

Effective "black out" privacy from side views outside the 60 degree viewing angle. Reversible between a glossy side and glare-reducing matte. Matte surface helps reduce glare and hide fingerprints.