GGS Optical Glass LCD Screen Protector 2.7" for Digital Cameras Canon, Nikon, Pentax Sony Olympus: 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. It's only 0.5mm thick with 4 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 Install: 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, and you're done! Easy to install and bubble free. No adhesive backing on the LCD screen, only at the border of the film for clearness. Can be removed and reinstalled without leaving ugly residue on your LCD screen.