This High quality Air Valves fit all standard aquarium air line tubing(OD:0.6CM,ID:0.4CM)
This valves allow you to set the air flow as however you want..
You’d better put the air valves out of the water
This high quality 3-way outlet Air Control Lever Pump Valve made by Stainless Steel and Rubber;
The Fish Tank Air Valves Fit Aquarium Airline Tubing In Diameter : 0.4cm/0.2″;
Valves can use for Fish Tank’s Oxygen and CO2 system;
Aquarium Suction Cups Holder fit the Valves, So All The Valves can be fixed on the glass of the fish tank;
NOTICE: Valves Toxic free which does not harm your fish.