Every "Lab Animal System" comes with an Accessory Kit containing a ten foot oxygen hose, flowmeter, oxygen flush assembly, vaporizer, breathing circuit, chamber, nosecones, waste gas evacuation tubing and two VaporGuard filters. One dial setting delivers a consistent and safe anesthetic level.All waste gases are scavenged for easy evacuation. Dual- & multi-patient circuits allow procedures to be handled in an assembly-line manner.Breathing circuits allow flat, prone or supine positions with head access. Positive sealing gasket on induction chambers minimize exposure to any waste gases.