Features Excellent PP Material The stop check valve is made of high-quality PP plastic material, which is wear-resistant and durable. Strong Pressure Resistance The stop check valve has sufficient pressure load capacity and rigidity to meet the actual use requirements within the appropriate range. Application: This one-way check valve is widely used for fish tank, food and beverage, medical equipment, chemical industry, etc. HIGH PERFORMANCE - Check valve has good thermal performance, strong chemical stability, non-toxic and odorless. Replacement:This one way check valve can be used to replace the broken check valve and fit perfectly, to prevent gas or liquid backflow. Specification: Item Type: Check Valve Material: Polypropylene Function: Connect the hose to prevent gas or liquid backflow Scope of application: fish tanks, food and beverage, medical equipment, chemical industry Size: approx. 4 mm / 0.2 inches. Package List: 10 x Check Valve Package List 10 x Check Valve