This is a brand new 100X plan objective for metallurgical microscopes with high quality. It is an International DIN/JIS lens. It fits common size (DIN/JIS standard) compound / biological microscopes. Retail value: $600. Features & Specifications: 100X Magnification Power Plan Achromatic Objective Lens 20mm Mounting Thread (in diameter) Manufactured under restrict ISO 9001 quality control system