Material: The binocular eye cup is made of soft rubber, good elasticity, easy to use, and will not damage your stereo microscope. | Size: This microscope eyepiece eye cup has an inner diameter of 36mm and is suitable for stereo microscopes from 32 to 36mm. | Better eye protection: Rubber eyepiece covers are used to reduce impact, better protect the eyes, and help create the perfect distance between the eyes and tentacles. | Features: Flat angle shape, equipped with rubber eyepiece guard, microscope is not interfered by external light source, convenient observation, so that the work is more comfortable. | Essential accessories: The rubber eyepiece cover is an essential microscope accessory that protects your stereo microscope and your eyes.