Multicolor Acrylic 3M-15 0.5-5GPM 2-18LPM Oxygen Air Gas Flowmeter with Control Valv-e for Oxygen Adjustable    Feature:  Used to measure single-phase non-pulsating gas flow  Mainly used to detect oxygen flow, and control the flow of oxygen  It can be used in industrial situations, oxygen bar and hospitals need to calculate the gas flow  Easy to use and lasting performance.  With 2-port flow meter, which is mainly made of plastic material, is used to measure the single-phase non-pulsating flux of liquid.Straight tube style connect the liquid tube by two male thread, easy to read for its clear scale.  Maximum temperature; below 60 degrees Celsius    Specification:  Color: White  Material: Plastic,Metal;  Product Name: Panel Type Flow Meter;  Applicable Medium: Water  Measure Range: 0.5-5GPM,2-18LPM;  Male Thread Diameter: 20mm/1/2BSP;  Thread Pitch: 14G  2-Port Center Distance: 128mm/5';  Internal Hole Diameter: 12mm/0.47';  Overall Size: 168 x 61 x 32mm/6.6' x 2.4' x 1.26'  Quantity: 1Pc     Note:  And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you     Package Content:  1 x Panel Type Flow Meter