Features 1.Size: Standard 1.25 inch telescope universal eyepiece. It comes with a sturdy plastic storage case that protects the eyepiece from dust. 2.10mm Focal Length Astronomical Telescope Eyepiece: Wide field of view, superior performance. Foldable eye mask for easy viewing with glasses. 3.Coating: Full multilayer wideband coating, optical glass, provides maximum brightness, high clarity. All metal body, all surface multilayer coating, excellent optical performance. 4.Features: All metal, bottom extinction threaded 1.25 in filter for use with standard 1.25 inch interface telescopes or filters. 5.Application: Heaven and earth dual use, suitable for all astronomical telescopes (1.25in interface), for astronomical observation of the moon surface, planets, nebulae, star clusters, diffuse nebulae and other celestial bodies, high brightness, large field of view, observation is very comfortable. Specification Item Type: 1.25in 10mm Telescope Eyepiece Weight: 84g/3oz Material: Aluminum alloy and optical glass Focal Length: 10mm Package List 1 x Eyepiece 1 x Storage Box