Please do not hesitate to ask questions i answer fast and honestly. NOS MTM-600 AN/PAS 23 magnifier. All have crystal clear glass and no proble. The Insight MTM-600 3x magnifier attachment is a high-quality accessory designed for night vision monoculars. Made by the reputable brand Insight, this magnifier attachment provides clear and magnified viewing capabilities for enhanced clarity in low-light conditions. Perfect for hunting, wildlife observation, or other outdoor activities, this product is a valuable addition to any night vision monocular setup.