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: Always 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!