The Invitrogen C10283 Countess Cell Counting Chamber Slides are brand new and sealed, manufactured by Thermo Fisher in the United States. These slides are designed for precise cell counting in various scientific and medical laboratory settings. Made with high-quality materials and rigorous attention to detail, these chamber slides provide accurate and reliable results for cell counting applications. Ideal for researchers and professionals in the healthcare and industrial fields, these slides offer a reliable and efficient tool for counting cells in a controlled environment.