Blue Marlin 10 pcs air flow controller Aquarium Tool

Two-Way Plastic Valve can be used as an in-line valve to control air flow from pump Fits standard air line tubing aquarium and Co2 tubing with inner diameter about 4 mm Help to increase oxygen and keep air fresh, create healthy environment for your fish Easy to connect hose Color: Yellow Package Included: 10x Aquarium Air Control Valves Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.