The Ace Powder Dispensing Funnel manufactured by Ace Glass has a flexible PTFE screw thread wrapped on a precision PTFE-ceramic shaft contained within a precision bore housing. The funnel is made of full inert materials, allowing flushing with solvents. No.15 Ace-Thred is easy to remove and clean. This funnel works on the principle of a ball screw. By turning the knob, the rate or amount of powder can be controlled, so that the powder can be fed into the funnel like a conveyor belt.