1. Using high-strength gorilla glass 2. Wear-resistant and scratch-resistant 3. Prevent foreign objects from entering and provide comprehensive protection for the lens 4. AF coating is hydrophobic and oil-resistant, easy to clean 5. Compatible with Osmo Action 3 6. Dimensions: Length 32.4mm, Width 32.4mm, Height 6.9mm 7. Weight: 7.8 grams