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
Lighter Vixen bar and tube rings for an 80mm refractor? - Refractors - Cloudy Nights
More Blue 80mm Tube Mounting Rings | First Light Optics
William Optics Mounting Rings (Set of 2) - 90mm (3.54")
HITSAN INCORPORATION Inner Diameter 80mm 90mm 100mm 125mm Tube Ring Hoop Metal Clamp Ring for FC60 Monocular stronomical Telescope Accessories Pair Color 114mm Tube Ring : Amazon.in: Jewellery
Antares Telescope Tube Mounting Rings - 3.5" (90mm) (Set of 2) for many 80mm Refractors (Same as Orion) - Camera Concepts & Telescope Solutions
80mm Tube Rings(pair)/ 573852707392 | eBay
Amazon.com: Omegon 90mm Tube Clamps for 80/400 Telescope : Electronics
Amazon.com : William Optics Mounting Rings (Set of 2) - 90mm (3.54") : Telescope Accessories : Electronics