Fermtech Wine / Beer Thief for Homebrew Beer or Homemade Wine Hydrometer TestingFermtech Wine Beer Thief & Test Tube Description This high quality acrylic thief allows a hydrometer to be inserted to take gravity readings without removing any product from fermenter. The thief acts as its own sample jar. Dip into fermenter to take a sample, then touch tip to the rim of fermenter to empty thief back into fermenter. Take readings with virtually no product loss. Features For use with hydrometers or to sample product Approx 19" long