Features: Experience comfort and relaxation with our eyepiece cover. It provides a soft and comfortable fit without pressure on your eyes. When used with optical devices, it helps relieve eye fatigue by blocking glare and enhancing weak light, while improving focus on the target by reducing distractions from surrounding movement. The eyepiece cover reduces impact and offers better protection for your eyes. Helps maintain the optimal distance between the eye and the eyepiece. Suitable for stereo microscopes, wide-angle microscope eyepieces, and other lens systems. Specifications: Material: ABS Inner Diameter: 28mm, 30mm, 32mm, 33mm, 33.5mm, 37mm Package Includes: 1 Piece Eyepiece Cover Note: Please allow 1mm error due to manual measurement. Due to differences in monitor displays, the image may not reflect the actual color.