LZB-3 Glass Tube Liquid Flowmeter, Panel Type Water Flow Meter Adjustable Black Knob Water Flow Meter Panel Mount Type Flowmeter(10-100mL/min) - - Amazon.com
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tatoko 1/2 Inch PT Thread 0.05-0.5GPM 0.2-2LMP Water Liquid Flow Meter Flowmeter: Amazon.com: Industrial & Scientific