Zhejiang Terasun Air Duct Co., Ltd. is a professional company, which is engaged in the manufacture of air ducts and composite boards. We are a leader in researching and developing new, environmentally friendly and energy-saving building materials and composite materials. Our company was established in 1998. We have independently researched and developed over ten new types of building materials and have obtained 18 national patents (including 3 patents for invention). Our R&D strength and technical abilities keep ahead in the world. Our company has been honored as "Zhejiang Province...