AQUANEAT Aquarium Control Valve 20PCS,2 Way Air Valve,Fish Tank Air Flow Control Valves for 3/16" Airline Tubing, Plastic Air Regulator, for Aquarium Air Pump Accessories

The airflow control valve is convenient for adjusting the gas volume of the air pump;Suitable for fish tanks, aquariums, aquaculture and gardening system Reliability material:Made of safety and healthy plastic,and won't have any adverse effects on your fish Suitable air tubing : standard 3/16'' airline tubing;Valve interface is tightly attached to the trachea,prevent air leakage and slipping Free Adjustment::Simply rotate the button to adjust the air flow rate Easy to Install:Connect airline tubing to both ends of the valve;Twist the knob counterclockwise to open and clockwise to close it