1,Backflow Prevention: Good thermal performance, strong chemical stability, nontoxic and tasteless, can prevent gas or liquid backflow. 2,Strong Pressure Bearing Capacity: One way valve has enough pressure bearing capacity and rigidity to meet the actual use requirements within its proper range. 3,Corrosion Resistance: good ozone resistance, high temperature resistance and corrosion resistance, used in fish tank, food and beverage, chemical industry. 4,Perfect Replacement: This one way check valve is easy to replace the broken check valve, perfect replacement, stable performance. 5,PP Material: 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.