Fits any diameter telescope tube except Schmidt-Cassegrain telescope optical tubes, includes two attachment screws. Dovetail base fits finder scope or reflex sight bracket so you can securely attach an aiming device to any telescope. Made of high strength Aluminum with Anodizing Aluminium Process. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.