Fangrui Product Details Easily Correct Upside Down And Left-right Reversed Image: Allow You View Things During Daytime In Correct Position Standard 1.25 Inch Diameter: Fit For 1.25 Inch Eyepiece And Telescope Focuser Designed For: Work With Refractor And Catadioptric Telescopes,not For Reflector Telescope Wide 45 Degree Angle: You Can View Correct Image From Refractor Telescope Stand And Just Look Down With A Comfortable Angle. Super Easy To Use: Just Insert Into 1.25 Inch Telescope At The Silver End,the Other End Fix 1.25 Inch Eyepiece By The Screw. With Dust Cover: Keep Your Lens Clear,prolong Life. Material:plastic Colour:black Package Contents: 1 * 45-degree Diagonal Adapter Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.