These are a pair of brand new 20X wide field microscope eyepieces. They are Achromatic (International DIN/JIS) standard size with outside diameter of approx. 23mm. They fit most common size microscopes. Give your microscope a boost with greater power & clarity.

Features & Specifications: 20X Magnification Power 23 mm Mounting Size (in diameter) 5-Year Warranty Unbeatable Low Price Satisfaction Guaranteed or Your Money Back! Availability: Usually ships the next business day. EP20X23$29.98