[COMPATIBILITY] 1.25 Inch Diagonal Mirror compatible with 1.25in eyepieces and refractor telescopes. [UPRIGHT IMAGES] 90 Degree Angle for upright images in celestial and land observations. [CLEAR VIEWS] Fully Coated Lens for superior image fidelity with dust cover included. [EASY INSTALLATION] Simple to install and use, securely fits 1.25in eyepieces with a screw. [DURABLE DESIGN] Sturdy construction with metal and plastic materials for long-lasting use.