Description Features 1. 30 meters waterproof depth, anti-pressure protection is not penetrated. 2. The body is made of high toughness PC material and is resistant to corrosion. 3. Elastic lock for easy removal. 4. Light-transparent material, no need to worry about light during shooting. Specifications 1. Shell material: High light transmittance and corrosion resistance PC Bayer 2805, Germany 2. Waterproof depth: 30m 3. Lens part: PC is coated with antireflection, hardening and waterproof film 4. Key material: Aluminum alloy 6030 5. Spring material: 304 stainless steel 6. Waterproof ring material: Amorphous high activity silica gel 7. Connecting shaft material between main body and rear cover: High hardness 304 stainless steel 8. Product size: 8.5 L x 8 W x 4.5 H cm 9. Product weight: 90g Package List 1. Waterproof case x 1 2. Long screw x 1 3. Invisible base x 1 4. Anti-fog sheet x 1 (a pack of 6 pieces)