Third party quality test is to make sure that the quality test on air purification filters is more objective and the product quality is more credible. Authoritative third parties have been invited to conduct quality tests and certificates have been obtained. You may find them on the official website. The quality certificates are strong evidence about the company's capability. They are solid foundation for the business development in domestic and foreign markets.

Nanjing Blue Sky Filter Co.,Ltd., mainly specializing in designing, producing and selling hvac box filter, is a market notable manufacturer in China. According to the material, Blue Sky's products are divided into several categories, and filter bags is one of them. In the production process, advanced testing equipment is used to test the products to ensure the high performance and consistency of the products. The use of this product will insulate people from rising electricity prices. Instead, replacing the old ones with this product helps people cut costs on electricity.

We are devoted to sticking to the core idea of "customer-center and human-oriented". We will wholeheartedly serve every customer and provide them with products with actual values.