When the required concentration needs to change during oxygen therapy, the adult aerosol mask, with the choice of 6 venturies or a multi venturi mask kit will offer the choice to suit the individual patients requirements. The aerosol mask can be used with a nebuliser or 22mm corrugated tubing for combined oxygen therapy and humidification. Integrated Plastic Nose Bridge 22mm Male Swivel Connector Stepped Mask Construction Latex Free Knitted Strap with secure ends Soft Feathered Edges Available with Nose Clip