Designed for use on your 70-90mm aperture nighttime optical tube assembly for viewing the sun or solar eclipses, the iOptron 60mm White-Light Solar Filter fits over the front of the OTA's dew shield and is held in place with three thumbscrews. For longevity and safety the filter is made of an infused polymer material called SolarLite to ensure that it will not develop pinholes or scratches — and since it's rigid, it won't tear or puncture like film filters can. It has an optical density of 5 that transmits just 1/1000th of 1% of the harmful intense light from the sun to make it safe to view.
To ensure the filter will fit your OTA, simply measure the outside diameter of the dew shield — the filter's mounting ring has an inside diameter from 84-104mm so as long as the outside diameter of the dew shield falls in that range, it will fit. Remember to practice safe solar viewing techniques and never look directly at the sun without certified solar viewing glasses and equipment.