Now you can turn off the powder flow and store your powder in its original container with no fear of misidentifying or damage to your hopper from chemical attack. Viewing window allows monitoring powder level in use without removing bottle. Powder measure bottle adapter fits all Lee powder measures Powder Measure Bottle Adapter on Auto-Drum Powder Measure Allows dispensing powder directly from the shipping container of most popular powder manufactures Includes a crystal clear bottle that holds over a half a pound of ball powder Works on all of these and many more (53mm or 43mm thread) Dispensing powder directly from the bottle assures positive identification of the powder type Adapter is manufactured from Polypropylene, resistant to attack from all types of powder