GGS LCD screen protector uses ultra thin optical glass, it is high transparency, anti-scrape, anti-bump, anti-ageing and easy to instal. It is rigid and made of optical glass material, which achieves more than 90% of transmittance (higher than plastic LCD screen protectors), thus making the LCD screen clear. Only 0.2mm thick with 6 layers of coatings and UV Protection. Optical glass strengthened through special crafting process. Prevent scratches, collisions and moderate impact to the LCD screen. The protector is reusable. Easy to Instal, No trimming required, fit directly on your LCD screen. Just clean your LCD screen first, peel off the white back of the protector to stick. Easy to instal and bubble free, unlike plastic protectors which alway give you bubbles between the protector and the screen. No adhesive backing to the LCD screen, only round the border edges. Can be removed and reinstalled without leaving residual on your LCD screen. The GGS III includes an anti-fog eyepiece.