Aquarium Fish Tank Air Pump Accessories 5 Pcs Of Air Adjusters + 5 Pcs Of Check Valves

The material of air adjuster is nickel plated copper The material of check valve is plastic Package include :5 pcs of air adjusters + 5 pcs of check valves Please keep the gas direction follow the allow on check valves Suitable hose : 4-5mm (3/16 inch)