•The protective respiratory filter is an upgraded product of disposable respiratory filters. In lung function testing, it can not only filter out droplets containing bacterial pathogens from patients to protect lung function testing equipment, but also prevent the risk of cross infection between doctors and patients in the lung function room

•BY-GL-341/BY-GL-342/BY-GL-343/BY-GL-344/BY-GL-345/BY-GL-346

•Size ID Diameter 15-50