3M Privacy Filter for Widescreen Desktop LCD Monitor 24.0in

Amazon

Effective black out privacy from side views outside the 60-degree viewing angle 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 100 percent hand inspected for quality assurance

Euroffice

Effective black-out privacy from side views outside the 60-degree viewing angle. Helps reduce reflections so you see your screen clearly with pristine image clarity. Reversible between a glossy side and glare-reducing matte.