Orion 7394 Atlas Telescope Mount Extension Steel extension pier raises the Atlas EQ-G or Atlas Pro AZ/EQ-G equatorial mount head 8 4" for easier viewing Ideal for viewing through refractor telescopes, especially long focal length refractors, since the eyepiece can be low to the ground when viewing objects near zenith With the Atlas Mount Extension, you no longer have to sit on the gound for a refractor view of the Hercules star cluster!