GSO 1.25" Plossl Eyepiece - 40mm # GSP-40 1.25 inch 40mm plossl eyepiece, 45 degree apparent field of view Fully multi-coated lenses, 4 lens elements, Blackened lens edges 31mm eye relief, fold-down rubber eyeguard Threaded for standard 1.25" astronomy filters Weight 5.5oz., Made in Taiwan