Feature 1SUPERIOR PERFORMANCE: Microscopes rubber eyecups provide better viewing without interference from external light sources. 2PREMIUM MATERIAL: Rubber eyepiece eyeshields are made of rubber, foldable, easy to use, durable and practical. 3APPLICABLE: Eyepiece eyecups have an inner diameter of 27mm/1.06in and are suitable for microscope eyepieces, monoculars and binoculars of 4248mm/1.651.89in. 4EYE PROTECTION: Microscope eyepiece eyeshields are designed to reduce impact and better guard your eyes. 5PRACTICAL TOOL: Microscope eyepiece eyeshields help to create the perfect distance between the eye and the tentacle.SpecificationItem Type:MicroscopeEyepieceEyeshieldsMaterial: RubberSize:Height: Approx. 38 mm/1.50inDiameter: Approx. 46 mm/1.81inAperture: Approx. 27 mm/1.06inSuitable for 42-48mm/1.65-1.89in Lens .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 xMicroscopeEyepieceEyeshieldsNotePlease allow for some errors in manual measurements.