Product Specification Product Name: HMF-YK001 Disposabie breathing fiter(lung function) Caliber:Machine side:16*17mminterface Patient side:F22/M15 interface(in line with YY104001-2015/53651-2004) Particle size of the fiter:0.5um of the particlesmicroorganisms and viruses Filtration efficiency: Non-woven and needled cotton99.9%