This is a replacement 6 in. stainless steel tube for the Blichmann WineEasy Vacuum Pump. One side goes into the guest fitting on the check valve assembly of the WineEasy Vacuum Pump, and the other goes through the small hole in the two hole stopper to pull a vacuum for vacuum degassing or racking. If your 6 in. stainless steel tube for your WineEasy Vacuum Pump goes missing or becomes damaged, this is the replacement you need! An authentic part straight from Blichmann Engineering!