Orion 07759 Deluxe Safety Film Solar Filter 7.17 Inch Inside Diameter (Silver) Explore the Sun safely through a telescope with this high-quality solar filter featuring Baader film in a sturdy aluminum cell Fits Orion 6, EON 130mm ED Triplet, Sky Quest XT6, XT6 PLUS, XT6i, Sky View Pro 6 & 6LT, Star Blast 6 & 6i, and Celestron 6SE telescopes Filter is mounted in a foam-lined, clear-anodized aluminum cell featuring three equidistant securing thumbscrews for secure telescope attachment This filter has an inside diameter of 7.17 inches - it is designed to fit optical tubes with an outer diameter of 6.92 inches to 7.17 inches with included shim materials and securing thumbscrews Note: All Orion solar filters are designed for use with an adequate friction fit attachment. Thumbscrews should only be used to keep filter securely in place once a friction fit has been achieved