The Corning Costar 3997 96 Well Cell Culture Cluster Flat Bottom with Lid is a high-quality polystyrene product manufactured in the United States. This pack of 10 units is designed for use in medical and biological laboratories, providing a reliable and durable option for cell culture studies. The flat bottom design allows for easy addition and removal of samples, while the lid ensures optimal growth conditions for cells. The Corning Costar brand is well-known for its superior laboratory supplies, making this product a trusted choice for researchers and professionals in the healthcare industry.