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 resistance Constructed of dark translucent glass – allows easy viewing of contents, protects light sensitive fluids, and allows storage of fluids not compatible with plastic One-touch stainless steel pump – Dispenses approximately 0.2cc of liquid with each pump One handed operation is perfect for cleaning with swabs and brushes Neck size: 38-400 mm; Stem length – 2.08 in; Inner diameter of the stem: 0.16 in +/- .005 in Genuine Menda pump – made in the United States of America for superior quality This item is made and stocked in Santa Barbara, CA.