The AutoThrow powder hopper is made from PETG and incorporates a valve which blocks the flow when rotated. This hopper holds over 1 lb of powder. Hopper cover included.

V3-style has an X and O mark to indicate whether it is open or closed.  Fits any V2 or V 3 AutoThrow.

V4-style is designed to lock in place on a V4 AutoTrickler and cannot be removed unless the hopper is closed.

V3-style is pictured.