Hans Rudolph 5570 3 - Liter Calibration
Hans Rudolph 5570 3 - Liter Calibration
83477 - Hans Rudolph 5570 3 - Liter Calibration

The 3 Liter size Syringe has been recommended as a minimum standard by the "Report of 1977 Snow Bird Workshop on Standardization of Spirometry", as the minimum volume to test spirometers.