Description Our microscope eyepiece guards are designed to provide optimal comfort and protection for your eyes during extended observation sessions. Made from excellent rubber, these eyepiece covers fit snugly over the eyepiece, shielding your eyes from external light and reducing strain. Features -Color:Black -Material:Rubber -Size:4.20X3.20X1.40cm/1.65X1.26X0.55in -Inner diameter: 30 mm. -Recommended outer diameter: 29-31 mm. -Material: made from Long-lasting and comfortable rubber material, ensuring longlasting use and comfort during extended observation sessions -Versatile design: suitable for both microscopes and binoculars, effectively protecting eyes from light interference and enhancing viewing clarity -Easy to use: convenient to install and remove, fitting well on appropriately sized microscopes for handy usage -Effective protection: significantly reduces eye fatigue and glare, providing a clear and comfortable viewing experience for users -Multiple applications: ideal for use in laboratories, and outdoor observations, catering to various needs and environmentsPackage list: 2 x eyepiece covers