GGS Optical Glass DSLR LCD Screen Protector for Nikon D3100 High Light Transmittance. Only 0.5mm thick with 6 layers of coatings and UV Protection. Optical glass strengthened through special crafting process. Scratch Proof, Invisible protection Prevent scratches, collisions and moderate impact to the LCD screen. High transparency, anti-scrape, anti-bump, anti-aging and easy to install