High-quality prism ensures high light transmission and provides high defination images.The fully coated lens are supplied with a dust cover to keep your lens clean and clear.With wide 90 degree angle, it is convenient for viewing refractor image from telescope stand.Use the 90 degree diagonal mirror with a refracting telescope, the image is upright, with the left and right reversed.Compatible with 0.965 inch telescope eyepieces.Colour: blackMaterial: plasticPackage Contents:1 * Telescope Diagonal AdapterOnly the above package content, other products are not included.Note: Light 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.