The product is a set of four EVOS microscope lenses, each with different magnifications and numerical apertures. The lenses included are 10x0.25, 40x0.65, 20x0.40, and 4x0.13. These lenses are designed for use in a microscope to observe and study various specimens with high precision and clarity. The EVOS brand is known for producing high-quality microscope lenses, making this set a reliable and precise tool for healthcare, lab, and dental professionals.