10 320293068 MASK,OXYGEN:MULTI-VENT GENERAL CHARACTERISTICS ITEM DESCRIPTION: MULTI-VENT PRESSURE DAMAND TYP E,MOUTH & NOSE DESIGN TYPE, PLASTIC,217 MM TUBE LG,LARGE SZ,1 GREEN DIAL CONTROL.F/OXYGEN CONCENTRATIONS OF 24,26,28 & 30 PCT,1 WHITE DIAL CONTR OL F/OXYGEN CONCENTRATIONS OF 35,40 EA 100