The Amico Oxygen Flowmeter FMO-15U-GM, 0-15 LPM German Male (DIN), USA Color Code is thorpe style and has a small and light brass body. The flowmeter has a white background making it easy to read and comes with a “D” shaped knob. The inner tube and labeling are color coded. The Amico Oxygen Flowmeter FMO-15U-GM, 0-15 LPM German Male (DIN), USA Color Code has a small and light brass body. The thorpe style flowmeter has a white background making it easy to read, comes with a “D” shaped knob, and has color coded tube and labeling. The flowmeter also features an inlet filter as well as an inlet extension. Amico Flow Range: 0-15 LPM Standard:USA Connection Type: German Male PSI:50 PSI Flowmeter Options:Dial