The product is a lot of 2 Spencer objective lenses with magnifications of 4x and 100x, specifically model numbers 1075 and 1079. These lenses are intended for use in microbiological, medical, and biological laboratories. Made in the United States by Spencer, a reputable brand in the field of microscope parts and accessories, these lenses are designed for precision and accuracy in scientific research and analysis. The 1mm oil immersion objective lens allows for detailed examination of samples with high magnification, making it a valuable tool for professionals in various scientific disciplines.