Lwang 1.25inch 31.7mm Plossl 4mm Full Coated Eyepiece Lens for Telescopes Accessories Size: the standard 1.25 inch /31.7mm telescope common eyepiece interface Fully multi-coated lenses, 4 lens elements, Blackened lens edges Weight: 64g,Focal length: 4mm Genuine Datyson Plossl 4mm high-power eyepiece, suitable for 1.25 inch /31.7mm astronomical telescope Apply: watch the scenery, bright celestial observations, nebula and so