I have the 2" focuser from my Orion Refractor. I completely rebuilt and relubed this thing so it works VERY smoothly. This will fit virtually any of the Chinese models/sizes available out there right now. Comes with 1.25" diagonal adapter and I have upgraded it with the new Orion Aluminum focus knobs. New this setup would be over well over $80. Asking $55 and I will pay shipping.