80/100/110/150/200mm Round Pipe Check Valve Air Duct Check Ventilation Valve Pipe Draft Blocker Exhaust Fan Hose Proof Valve

High-concerned chemical : None EU LVD Voltage : Electricty-free Structure : Gate Material : Plastic Model Number : Pipe Check Valve Is Smart Device : no Origin : Mainland China Certification : NONE Material: : Plastic Specification: : 80/100/110/150/200mm Shape: : Round Feature1: : Durable Feature2: : Portable