Specifications:
Type: Air Valve
Outlet Diameter: 4mm
Inlet Diameter: 4mm
Fit standard 3/16″ diameter tubing

Feature:
These aquarium oxygenation gas supply system accessories work seamlessly with the air pump air pipe, allowing you to fine-tune the gas amount.
The size of the switch is adjustable, making it suitable for general control of air pump output and other applications requiring size adjustment.
The valves are crafted with exquisite workmanship, providing accurate control.

Package Included:
20 x Air Valves