Model number: 3338mm Rubber Eyepiece Eyecup Overview A durable, portable eyecup designed for stereo microscopes with a binocular drawtube. Made from elasticity rubber for a secure fit and comfortable viewing during extended use. Sized to fit eyepiece lenses between 33 and 39 mm and optimized for magnifications up to 500X. Key benefits Comfortable viewing: soft, elasticity rubber cushions the eye area to reduce fatigue during long observation sessions. Improved image stability: blocks stray light and glare to help maintain consistent contrast and clearer viewing. Secure fit and compatibility: stretches to fit eyepiece lenses in the 33 to 39 mm range, compatible with stereo microscopes that use a binocular drawtube. Durable and portable: resilient material resists deformation and makes the eyecup easy to carry and install for field or classroom use. Easy maintenance: smooth rubber surface wipes clean quickly without special tools. Specifications Material: elasticity rubber Drawtube type: binocular Microscope type: stereo microscope Size compatibility: for 33 to 39 mm eyepiece lenses Magnification: suitable for use at 500X and under Model number: 3338mm Rubber Eyepiece Eyecup Practical applications Education and teaching: comfortable and repeatable eye positioning for students and instructors during lab sessions and demonstrations. Field inspection and portable microscopy: lightweight and easy to install for on site sample evaluation, hobbyist collecting, and outdoor research. Industrial and hobby use: useful for electronics inspection, coin and stamp examination, and small part assembly where consistent eye placement and reduced stray light improve accuracy. What you get A single, elasticity rubber eyecup engineered to fit 33 to 39 mm microscope eyepieces, improve viewing comfort, and provide stable performance for stereo microscopes with a binocular drawtube. Easy to install, clean, and carry for everyday laboratory, classroom, or field use.