7 inch flexible duct-air duct tubing Customers are fond of 7 inch flexible duct-air duct tubing produced by Shanghai Xuanyuan Air Conditioning Equipment Co., Ltd. for its highest quality. From raw materials selection, production to packing, the product will undergo strict tests during each production process. And the quality inspection process is conducted by our professional QC team who are all experienced in this field. And it is produced in strict conformity with the international quality system standard and has passed related international quality certification like CE.
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Xuanyuan 7 inch flexible duct-air duct tubing We have successfully delivered an exceptional Xuanyuan to the China market and we will keep on going global. Over the past years, we have been striving to enhance the 'China Quality' recognition by improving the quality of products and services. We have been an active participant in many China and international exhibitions, sharing brand information with buyers to increase brand awareness.hvac tubing,air duct pipe,spiral ductwork.