1. Sun Film for Telescopes: This sun film is designed for telescopes with diameters of 80/100/120/140/160/180/200/220/250 mm. The metal pressure ring ensures a secure fit without the need for glue or adhesives. 2. Durable: Constructed with a metal outer ring and pressure ring, this sun film resists deformation and offers a long service life. It is built to endure regular use while providing reliable protection. 3. Safe 5.0 Density Silver Solar Film: The sun film features a doublesided silver solar film with a density of 5.0, effectively blocking harmful solar radiation while enabling safe solar observation. 4. Wide Application Suitable for cameras, monocular/binocular telescopes, astronomical telescopes, and birdwatching telescopes. This sun film has versatile applications and is essential for anyone interested in solar observation. 5. Important Safety Precautions: Before observing the sun with a telescope, always install a solar film to protect your eyes from permanent damage. Ensure the film is checked for light leakage before use, and discontinue use if any is detected.