Features Excellent PP Material The check valve is made of high quality PP plastic material, wear-resistant and durable. STRONG PRESSURE RESISTANCE - The stop check valve has sufficient load capacity and rigidity to meet the actual use requirements within an appropriate range. Application This one-way check valve is widely used for aquariums, food and beverage, medical equipment, chemical industry, etc. HIGH PERFORMANCE:The 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. Specifications: Item Type: Check Valve Material: PP Function: Connect the hose to prevent gas or liquid backflow Scope of application: aquarium, food and beverage, medical equipment, chemical industry Size: about 4mm/0.2inch Package List: 10 x Check Valves Package List 10 x Check Valve