The Amico Oxygen Flowmeter FMO-04U-F4-D, 0-4 LPM 1/4″ FNPT, USA Color Code features a dial style body that is encased in anodized aluminum. The smallest dial increment on the flowmeter is 0 LPM. The flowmeter has an easy to read window for selected LPM. All labeling is USA color coded based on gas type. Amico Flow Range: 0-4 LPM Connection Type: 1/4" FNPT PSI:50 PSI Flowmeter Options:Dial