This is a pair of eye-guards that fit stereo microscopes. They are foldable for different applications. Made of high performance material, installs in seconds, lightweight design, appearance, and easy to use. Features - Color: Black. - Material: Rubber. - Size: 3.90X3.90X3.90cm/1.53X1.53X1.53 inch. - They are fordable for different applications. in use. Eye cups for microscopes telescopes. - Improves clarity/focus, eliminates peripheral distractions, reduces glare, protects the eyes from the elements. - The microscope eye shield is made of rubber material, which acts as a buffer to protect the eyepiece from collision. - The microscope guard can also protect the lens and water. - When doing experiments, the eyepiece cover can block the light, allowing you to better observe the sample. Package list: 2 x eyepiece covers