AKOAK 20 Pack Standard 4mm Inner Diameter Aquarium Air Line Tubing Fish Tank Oxygen Air Pump Volume Flow Control Valve（Grey）

Description

Material:PlasticSize(Approx.):47mm x 23mm /1.85″ x 0.9″Inner Diameter:4mm /0.15″Color:GreyQuantity:20 Count Plastic air valves are for fish tank aquarium use. Help to increase oxygen and keep air fresh, create healthy environment for your fish. Easy to connect hose.