1pcs Ventilation Pipe Round Check Valve ABS Air Duct Control Exhaust Fan Pipe Accessories 314in 100mm*393in 433in 590in Features: *Excellent material: Made from high-quality materials, this ventilation pipe check valve ensures durability and long-lasting performance. *Various sizes available: With options ranging from 80mm to 200mm, this check valve can accommodate different pipe diameters, providing flexibility for various ventilation projects. *Clever design: The clever design of this air duct control check valve allows for smooth airflow while avoidingbackdraft, ensuring efficient ventilation and avoiding smellfrom spreading. *Easy to install: This check valve is designed for easy installation, saving time and effort. Just connect it to the ventilation pipe, and it is ready to use. *Wide range of applications: Suitable for various applicati ons, including fan pipes, pipe projects, and ventilation s, this check valve is a versatile solution for maintaining proper airflow and controlling the direction of ventilation. *Non-oxidizing: With a non-oxidizing finish, this check valve is resistant to and ensures longevity, making it a reliable part for long-term ventilation needs. Specifications: *Product Name: Ventilation Pipe Check Valve *M aterial:ABS *Size: 80mm/3.14in, 100mm*3.93in, 110mm/4.33in, 150mm/5.90in, 200mm/7.87in (optional) *Color: White Package Content: 1* Ventilation Pipe Check Valve Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_