Feature: * The pneumatic check valve can prevent the aquarium water from backing up, which is caused by the decline, and maintain the function and service life of the dioxide cylinder of carbon. * When used in the ozone generator, the air check valve can prevent ozone from returning to the air pump and erosion of the propeller. *Aquarium check valve can protect the powerhead from water backflow caused by power outage. *Simple check valve is easy to install, requires no additional tools and can be positioned anywhere you want in seconds. * These Stainless Steel One Way Check Valves are suitable for CO2 supply system in fish tank, aquarium and others. Specification: Material: stainless steel Color: as picture shown Size: 37.1x 7.9mm / 1.6’’ x 0.3’’ < p>Age package included: 1pc x stainless steel check valve
