The PrimaLuceLab PLUS Support Rings are made of aluminum blocks that are high precision CNC machined. The aluminum is then sandblasted to achieve a very smooth surface finish and is anodized (hard anodizing) to increase the hardness of the material and protect it from oxidation.
Thanks to the particular design, the PLUS support rings are equipped with holes (above and below each ring) to permit the attachment of:
Vixen or Losmandy plates below the rings to install the telescope on any mount
PLUS guide rings (each ring can be fixed on the support ring with 2 screws)
Vixen or Losmandy plates above the rings to increase the rigidity of the mechanical system and enable to install other accessories, such as dovetail clamps with guide rings to precisely adjust the position of the guide telescope.
PrimaLuceLab PLUS Support Rings for various brands of telescopes.
Be sure that you are choosing the proper ring size for your telescope's OTA diameter.