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Amazon.com : GRUS S8231 Optical Telescope Tube Ring 90MM (Pair) : Electronics
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Astronomical Telescope Tube Rings | Telescope Accessories | Hercules - S8230-80mm Tube - Aliexpress
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85mm PLUS support rings: Buy online | Primalucelab.com
80mm Tube Rings(pair)/ 573852707392 | eBay
80mm PLUS support rings: Buy online | Primalucelab.com
Amazon.com : Astromania Adjustable Guiding Scope Ring Set with Plate - 80 mm Inside Diameter (Pair) - for Telescope Tube Diameter or Finders 53 to 79mm : Electronics
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APM Telescopes. TS-Optics CNC Aluminium Tube Rings for telescopes with 114mm diameter
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80mm Tube Rings(pair) 573852707392 | eBay
Amazon.com : William Optics Mounting Rings (Set of 2) - 90mm (3.54") : Telescope Accessories : Electronics
