This Gear Coupling 3.25" Keyway Shaft I.D. Bore, 5.5" Hub, 6.25" O.D., 3.75" Length is in unused condition and is guaranteed to be fully functional. This item came from a large pharmaceutical company that had surplus new old stock inventory. We urge customers to view all photos as they show overall condition, included accessories and useful information. As seen in photos hub shows signs of long-term storage and shelf wear. Please note that all measurements stated in listing are approximate. We will be happy to provide additional information as well as photos so please feel free to contact us with any questions.