The following is taken from a product description page on the internet. Product Features ■ Built-in special micro-louvers prevent peeking from the sides. ■ Significantly reduces reflections from external light and lighting, preventing glare. ■ Enhances contrast to make text and images clear and sharp, improving visibility. ■ Uses a material with high surface hardness, making it scratch-resistant and protecting the screen. ■ Also protects the screen from annoying oil stains and dust. ■ It is a tab tape type that allows you to easily attach and detach the filter. 【Specifications】 ・Thickness (mm): 0.5 ・Applicable screen size (inches): 12.1W (16:10) ・Size (mm) Height x Width: 163.5 x 261.5 ・Surface reflection rate: 0.7% (absolute specular reflection rate) ・Visible light transmittance: 80% (JIS K 7361-1) ・Viewing angle: 60° (maximum transmittance ~5% range) It will be wrapped in a plastic bag and packaged. 3M Security/Privacy Filter High Grade Type 12.1-inch Wide PF12.1W H2 3M Security Filter Laptop Privacy Filter Security Filter Yu-Packet Post Seal