Features Backflow Prevention: Good thermal performance, strong chemical stability, non-toxic and tasteless, can prevent gas or liquid backflow. Strong Pressure Capacity: The one-way valve has enough pressure capacity and rigidity to meet the actual application needs in the right area. Corrosion resistance: good ozone resistance, high temperature resistance and corrosion resistance, used in aquarium, food and beverage and chemical industries. Perfect Replacement: This one-way check valve is an easy replacement of the broken check valve, perfect replacement, stable performance. PP Material: The one-way check valve is made of high quality PP material, which is wear-resistant and durable, and can be used for a long time. Specification: Item Type: Aquarium Check Valve Material: PP Function: Connect the hose to prevent backflow of gas or liquid Scope of application: aquarium, food and beverage, laboratory equipment, chemical industry Package list: 12x Aquarium Check Valve Package List 12 x Aquarium Check Valve