Features 1、Using PET and aluminum foil coating, it is sturdy, not easy to break. It has been certified (the same material as the solar observation mirror lens). 2、Double sided high density coating, no streaks and blisters, to ensure the safety of the user's eyes. 3、The high density coating also eliminates the pin hole effect, making the true color of the sun a neutral white instead of blue or orange. 4、Effectively filter the sunlight, which is more conducive to your observation, very suitable for astronomer, astrophile, etc. 5、The solar filter film is suitable for 22097 127SLT and products of similar size. By using this, you can make better observation. Specification Item Type: Solar Filter Film Applicable Model: for 22097 127SLT and similar products in size. Film Material: PET+Aluminum Foil Coating Frame Material: ABS Plastic Purpose: Astronomical Telescope Accessories Outer Diameter: Approx. 150mm / 5.9in Inner Diameter: Approx. 145mm / 5.7in Thickness: Approx. 25mm / 1.0in Package List 1 x Sun Filter Film