90 mm dual hinged rings. 90 mm ID with five 1/4-20 threaded holes top and bottom. This includes a center hole, two holes that are 1.5” apart and two holes that are 60 mm apart. Made in the USA on our cnc machines using 6061 T6 aluminum.
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Like everything Stellarvue, these rings are not only functionally perfect they are aesthetically perfect as well.
This is the set to get, if it will at all fit your scope. Nicely machined and felt-lined, it exudes quality. Although nominally 90mm, there's some tolerance--my OTA is about 93mm and it still fits, although the top and bottom bar are not perfectly parallel.
Stellarvue hinged mounting rings are the best quality rings I have ever purchased. The machine work, the fit and finish are perfect. Thank you for your superb products.
Thoughtful design with lots of mounting screw holes. Very nicely machined and a huge improvement over the foot on my ES 80 ED essentials.