NEW PFA Stem for the toughest liquid dispensing applications; use with highly corrosive fluids, virtually all industrial solvents, and most chemicals - Superior Chemical Resistivity chemically inert; resistant to acids, bases, and most common solvents. See PFA Chemical Resistance HERE. - Non-stick, low-friction properties - transport fluids and chemicals with minimal resistanceTin construction allows storage of fluids and chemicals not compatible with plasticUsed when strength and durability are importantOne-touch stainless steel pump Dispenses approximately 0.2cc of liquid with each pumpOne handed operation is perfect for cleaning with swabs and brushesNeck size: 1.25 diameter ; Stem length: 1.90 in; Inner diameter of the stem: 0.16 in - .005 inGenuine Menda pump made in the United States of America for superior qualityThis item is made in Santa Barbara, CA