This is a very sturdy and good-looking set of black clamp-style solid aluminum telescope mounting rings which are lined with green felt.
They are easily and smoothly closed by swinging the rotatable steel tightening screws and washer assemblies upward once the telescope tube is positioned in the rings.
Both the base and the top of each ring has a pair of female threaded screw holes spaced at two and five/eighths centers. These rings are adjustable due to the length of the steel clamping screws from 9.25 to 9.75 inside diameter. They were originally used with an 8-inch Meade Newtonian telescope.
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