SNYLI Environmental Technology (Shandong) Co., Ltd. (Abbr.: SNYLI) is a professional service provider of air purification products integrating R&D, design, production and sales for more than 10 years, with the registered brand of "SNYLI". We are a Company with ISO 9001:2015 and CE Certificates, our primary and medium filters are tested according to ISO 16890 and EN 779:2002. Each HEPA filter and ULPA filter will be scanned to detect possible leaks and filter performance, such as initial pressure drop and filter efficiency.