... Configuration SpecificationQuantity(pcs)VaporizerR-2000AHalothane, Enflurane, Isoflurane1Breathing tubesReusable2Air supply tubesO22Manual air bag and accessoriesBig, middle, small3Operator’s manualEnglish version1 Optional ConfigurationVentilator: R ... , Respiratory frequencny, I:E ratio.Safty valve pressure limit: 6KpaGood air tightness, high reliability, and minor respiration impedance