Diagonal Mirror Telescope 1.25'' 90 Degree Mirror for Astronomy Telescope Monocular Eyepiece Features: 1. Brand new and high quality 2.1.25 inch 90 degree angle mirror to ensure that the for image is upright, but left and right reversed 3. The diagonal reflector is suitable for viewing for celestial bodies and good for land observation use 4. The mirror is suitable for refraction and the Cassegrain telescope - not recommended for the reflector 5.Durable Tips The use of high frequency eyepiece rings is prone to abrasion. The hardness of the steel is high and it resists abrasion. Aluminum is low in hardness and does not resist abrasion. The interface material for this product is Carbon Steel(chrome-plated) Specification: 1. Body Material: Plastic+ Carbon Steel(chrome-plated) 2. Adapter telescope: Refractor telescopes 3. Adapter eyepiece: 1.25inch 4. Refraction angle: 90-Degree 5. Lens: Glass Package include: 1 x Mirror