Specification packing list: 1 pair of eyepiece caps Item type: Eyepiece cover Material: rubber Angle: flat angle Can block stray light, facilitate observation, protect eyes, and make work comfortable The inner diameter is 36mm (1.42in), suitable for 32mm (1.26in)-36mm (1.42in) stereo microscopes. Good elasticity, will not harm your stereo microscope. It can protect the eyes from external light damage, prevent dizziness, and see objects more clearly. An essential microscope accessory that can protect your stereo microscope and your eyes. Suitable for stereo microscopes.