Feature: 1. Eyepiece construction: Wide angle and long view relief, providing more complete field of view and comfortable viewing experience. 2. 1.25 inch 40mm eyepiece, provides the widest field of view with additional clarity and long view. 3. Full metal body, full surface multi‑layer coating, high quality optical performance. 4. Soft rubber eye protector goggles, standard 1.25 inch thread. 5. Sky and ground dual purpose, suitable for all astronomical telescope(31.7mm interface), used for astronomical observation of the surface of the moon, planets, nebulae, star clusters, dispersion nebulae and other heavenly body, high brightness, large field of view, very comfortable observation. Specification: Condition: Brand New Item Type: Monocular Eyepiece Material: Metal Color: Black Coating: Full Multilayer Coating, High Definition, Two Sets 4PCS Multilayer Fitment: for All Astronomical Telescope(31.7mm/1.25inch Interface) Weight: Approx. 100g Focal Length: Approx. 40mm/1.57inch, Long-focus, Medium and Low Power Eyepiece Size: Approx. 31.7mm/1.25inch . Package List: 1 x Monocular Eyepiece1 x Storage Box