These rings fit as I had hoped. I needed to attach a small refractor OTA to a small mount so I can use it. These two rings are well made and a bit overkill. I ended up using only one of the two to reduce the total weight on the small mount. So, all is well and I will continue to enjoy my little telescope well into the future. Thanks!
The Rings were a perfect fit for the Orion ST 80 that I purchased. Now if I can just find the parts that will allow it to fit on the losmandy mount that I have on top of my C 11