Eyepiece Eye Cups Caps Pair Binoculars Eye Guards Stereo Microscope Part Telescopes Eyecups Inner Diameter 32mm-36mm eyepiece cover for scope various biological stereo microscope monocular binoculars use rubber eye guards cylinder eye shield cupsFeatures:Soft rubber, can be folded.The rubber eye-mask is rubber, which is foldable, easy to use, and practical.Multiple diameter rubber eye guards eye in use.It applies to stereo microscope wide angle microscope eyepiece, and for 32-36mm eyepiece of the microscope and and other lens, Specifications: Material: RubberSize:Approx.3.6x3.6x2.3cm/1.41x1.41x0.9inchSize:Approx.3.6x3.6x1.8cm/1.41x1.41x0.7inchColor:BalckPackage Includes:2x Eye ShieldNote:.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thanks for your understandings.