99.99+% EfficiencyThe Main Flow Anti-Bacterial Anti-Viral Filter is the ultimate solution to keeping your indoor environment clean, healthy, and safe.It's the ideal solution for anyone worried about air quality. Such as caretakers of patients who use oxygen concentrators, CPAP machines, or nebulizers.A blend of high-quality materials with super strength sonically sealed plastic work to ensure improved air quality.Breathe easy knowing that you're protected from allergens, bacteria, and viruses. Get yours today!. Designed with sonically sealed plastic that's less likely to tear (no chemical adhesives). Perfect for use with oxygen concentrators, CPAP machines, or nebulizers. Filters 99.99+% of viruses and bacterial passing through to improve air quality . Connects to standard corrugated tubing . Low resistance to gas flow- bi-directional flow. Colour: Clear. Material: Plastic. 22mm I.D. x 15mm I.D./22mm O.D.. Bacterial filtration efficiency: 99.999+%. Viral filtration efficiency: 99.99+%. Dead space: 42mL. Flow resistance: approximately 1.5 cmH2O at 60 LPM. Guaranteed hassle-free money-back returns if you change your mindWhat do you get?3 Choices:1x Filter10x Filters15x Filters