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Amazon.com : Astromania Adjustable Guiding Scope Ring Set with Plate - 69 mm Inside Diameter (Pair) - for Telescope Tube Diameter or Finders 43 to 68mm : Electronics
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Amazon.com : SVBONY SV116 Guiding Scope Ring Kit for Telescope Tube Diameter or Finders 43mm to 70mm with Pair Ideal for Astrophotography : Electronics
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Amazon.com : Astromania Adjustable Guiding Scope Ring Set with Plate - 69 mm Inside Diameter (Pair) - for Telescope Tube Diameter or Finders 43 to 68mm : Electronics
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