The package we offer is double, containing 2 circular lens protectors for the main lens and 2 pairs of glass membranes for the 2 LCD screens (in the Osmo Action 2 Combo version). The membranes are easy to apply to the screens and the lens. The installation kits included in the package help in placing them without fingerprints, bubbles, and residues. Unlike other models on the market, TECH 4 PEOPLE offers a very high-quality option, resistant to scratches, oil accumulation, with 99% light transmission, and hardness of 9H (similar to that used for armor).