12Pcs Aquarium Check Valve 4mm One Way Valve Air Valve PP Oil Resistant One Way Valve for Fish Tank Air Pump Hose - ShopVlot

Backflow prevention: Good thermal performance, strong chemical stability, non-toxic and tasteless, can prevent gas or liquid backflow. Strong Pressure Bearing Capacity: One way valve has enough thrust bearing capacity and rigidity to meet the actual use requirements within its proper range. Corrosion resistance: good ozone resistance, high temperature resistance and corrosion resistance, used in fish tank, food and beverage, chemical industry. Perfect Replacement: This one-way check valve is eas