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 resistancePack of 10 replacement stems for 35770 stainless steel pumpsStem length 2.08 in ; Inner diameter of the stem: 0.16 in - 0.005 inMade in the United States of America for superior qualityThis item is stocked in Santa Barbara, CA.