This is a side operated screw feed funnel for the addition of powders and solids (up to 25 mesh) to reactions without problems of seizing or binding

Completely inert materials allow flushing with solvents without fear of contamination. #15 Ace-Thred offers easy disassembly for cleaning. Large 1-1/4" knob makes turning smooth and easy. Top outer and bottom inner joints are standard taper 24/40. A standard taper 14/20 outer joint atop inner joint is for easier flushing. Fabricated from borosilicate glass.

Features a flexible PTFE screw thread wrapped on a precision PTFE-ceramic shaft and contained within a precision bore housing. This offers a unique flexibility in that the thread can move aside temporarily; as one spacing increases, the adjacent spacing decreases, thereby maintaining an average feed rate.