Check the listing for details. 3Pcs Microscope Eyepiece Eye Cups 34-37 mm Rubber Eyepiece Cover, Black. Condition: New. Listed at 16.01 USD. The rubber eyepiece eye cup shield is an auxiliary component designed as an eyepiece, suitable for microscopes, single and double telescopes, bird watching scopes, aiming scopes and so on. It can protect the eyepiece, reduce light interference, and improve observation comfort and clarity.SpecificationColor: BlackMaterial: RubberDiameter: 41 mm / 1.61 inchInner Diameter: 26 mm / 1.02 inchSuitable Size: 34 - 37 mm / 1.34 - 1.46 inchPackage List: 3Pcs x Microscope Eyepiece Eye CupsAdvantageThe eyepiece cover is made of rubber, which has good elasticity, strong flexibility, smooth surface, comfortable touch, and can effectively block external stray light from entering, avoiding light interference that affects the observation effect.