This Erlab Captair 633 Smart Ductless Fume hood is in used condition, has been tested and is guaranteed to be fully functional. This unit came from a local lab that had surplus equipment. The previous owner had the unit disassembled for shipping. We reassembled the hood (minus the top filter unit) for the listing photos. Hood will be disassembled again for shipping. We urge customers to view all photos as they show overall condition, included accessories and functionality. We will be happy to provide additional information as well as photos so please feel free to contact us with any questions. The Captair 633 Smart Ductless fume hood is designed for applications and laboratories that require a larger hood area and filtration capacity. These larger hoods have extra depth and filtration capacity, offering optimum workspace and superior protection from harmful chemicals for the end-user.