This ZORBAX RX-C8 820950.913 analytical guard column is a high-quality product designed to enhance your chromatography columns and reservoirs. With a size of 4.6x12.5mm and a 5-micron quality, this column is perfect for those in the medical, lab equipment attachments and accessories, and healthcare industries. Whether you are looking to improve your business or industrial processes, this column is a great addition to your collection. It is a reliable and durable product that can be used for a variety of applications. With the ZORBAX brand name, you can trust that you are getting a high-quality product that will meet your needs. Buyer pays shipping and handling. Check out my store many great deals. Thanks for looking!!