This Salter Labs Percent-O2-Lock Venturi System is a transparent, air-entrainment, elongated mask with soft anatomical under the chin shape. A rotating sleeve air entrainment valve allows you to dial in seven different oxygen concentrations: 24, 26, 28, 31, 35, 40 or 50%.  Aluminum nose clip aids in a positive fit for appropriate oxygen % delivery. Over-the-ear or elastic head strap styles. Standard with three channel, crush resistant safety tubing. A high humidity adapter permits use of a nebulizer with this assembly.

• Easily adjusted, variable venturi system
• Unique, spring-loaded mechanism locks prescribed concentration in place
• Wide, adjustable elastic strap or over-the-ear style available in adult configuration
• Durable, plastic humidity cup, standard
• Ideal for long-term users and edentulous patients. Better fit.
• Accurate concentrations of oxygen with single unit
• Ensures safety and correct oxygen concentrations
• Fits comfortably in either configuration to hold mask in place
• Allows utilization of a humidifier or nebulizer with mask when prescribe