We offer discount for large quantity. We invite you to ! Black Adjustable Knob 0.1-1 GPM LZM-15 Type Water Flow Meter PanelThe LZM series flow meter, which is made of plastic, is used to measure single-phase, non-pulsating liquid stream. Product Name: Panel Type Flow Meter Model No.: LZM-15; Suitable Medium: WaterMeasurement Range: 0.1-1.0; LPM (liquid) : 0.5-4.0; External Thread: 21mm/0.83" (Diameter)Inner Bore: 13.5mm/0.53"(Diameter); Overall Size: 176 x 87 x 32mm/6.9" x 3.4" x 1.3" (L * W * T) Material: Plastic, Metal; Color: Black, Grey, TransparentWeight: 257g; Package Contents: 1 x Panel Type Flow MeterNote: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Measurement error is +/-1-3 cm. About usWe provide good product with best price, support wholesale order/