【Quality Material】Made of soft rubber that doesn't hurt your stereo microscope. | 【Function】Eyepiece cover is designed to reduce impact, and better protect your eyes. | 【Good Performance】Help create the perfect distance between the eye and the reach. | 【Good Match】The inner diameter is 36mm, suitable for 32-36mm stereo microscope. | 【Practical Tools】An essential microscope accessory to protect your stereo microscope and also your eyes.