Features: [PET COATED ALUMINUM FILM] - The solar observation film is made from PET coated aluminum, providing a durable and reliable solar filter for your telescope. [REDUCE LIGHT AND RADIATION] - With this thicken film solar filter, you can safely observe the sun without reducing the contrast of the subject. Perfect for capturing sunspots activity. [UPGRADED SOLAR FILM] - The second generation solar film features a thick and silver coating on both sides. It meets standard for solar filter film, ensuring eye protections during sun observation. [EASY TO CLEAN] - This solar film is not only resistant to damage but also easy to clean. Simply use a clean paper towel, or wash it with water. Wind and rain will not affect its performances. [SUITABLE FOR ASTROPHOTOGRAPHY] - This solar filter is not only suitable for visual observation of the sun with the eye but also for astrophotography. Specifications: Material: Aluminium Alloy, PET Outer Diameter: Approx.116mm/4.57'' Suitable for: 84-110mm Objective Lenses Package Includes: 1x Solar Telescope Filter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.