This polystyrene, bright red paddlewheel indicates liquid or gas flow from 5mL/sec. to 95mL/sec. The clear outer case allows for unobstructed view of the wheel which spins freely with flow. Not for use with corrosive fluids or temperature over 122°F (50°C). Can be used to connect tubing of 3/8" to 9/16" (10-14mm) ID
