Guaranteed to extend the life of any 2.0 mm, 3.0 mm, 3.2 mm, 4.6 mm, and 7.8mm ID column, SecurityGuard™ Standard Guard Cartridge System Column Protection is designed to fit any manufacturers’ standard HPLC column, making it the ultimate HPLC Guard Column. part number KJ0-4282Note: This is a Phenomenex product. To purchase, please visit https://www.phenomenex.com/securityguardparts