The SVBONY SV131 1.25" Plossl 32mm Eyepiece uses premium optics that are fully multi-coated for crisp images. The folding eyecup lets you view with or without glasses, works well for views of the moon, planets, deep-sky objects and terrestrial observations. It's a great birthday christmas gift. 1.25" Plossl eyepiece is suitable for any 1.25" telescope barlow lens and filter;also supports the installation of other 1.25 inches accessories.Thread size is M28.5*0.6mm,can supports standard 1.25-inch filter adapter installation. Comfortable eye relief. With 19mm exit pupil distance, it is convenient for you to observe for a long time. Folding down and removable rubber eye guard for wearing glasses and comfortable viewing as well as blocking stray light to increase the brightness of image. 16mm long eye relief, provides comfortable long term viewing for people with or without glasses. Blackened aluminum fully threaded 1.25" eyepiece barrel and inside thread design to avoid internal reflection and provide a crisp image.