* Standard 1.25'' diameter: Fit for 1.25'' eyepiece and telescope focuser
* Usage: Work with Refractor and catadioptric telescopes, not for reflector telescope
* Wide 90 degree angle: You can view correct image from refractor telescope stand and just look down with a comfortable angle avoiding neck strain when looking through the eyepiece
* Super easy to use: Just insert into 1.25'' telescope, the other end fix 1.25'' eyepiece by the screw.