This is a brand new WF10X wide field microscope eyepiece.
It is Achromatic (International DIN/JIS) standard size with outside diameter of 23 mm.
It fits most common size microscopes. Give your microscope a boost with greater power & clarity. 23 mm Mounting Size in diameter)
Professional and practical design with beautiful appearance, easy to carry and use.
Usually used in laboratories, schools, teachers, sample observation, eyepiece protection, etc.