The product is a pack of 21mm K Files made of stainless steel, specifically the 21mm #25 size. The pack contains 6 files with an expiration date of 6-7-25. These files are designed for use in healthcare, lab, and dental applications, providing high-quality tools for medical and lab professionals. The durable stainless steel construction ensures long-lasting performance, making them a reliable choice for precise and efficient procedures.