DongYang Hstube Co.,Ltd was established in 1996. We are 20 years manufacturer of flexible air duct , which always focus on our duct quality and sale service. Now we already become a professional supplier of this flexible duct for Netherlands ,Spain ,Iran ,Iraq and AE market. Our main product covers Aluminum foil duct ,Aluminum duct ,Insulated duct ,PVC & AL foil duct ,Canvas duct.