Yes, Pawprint Oxygen sells medical-grade, continuous flow Oxygen Concentrators that support a safe environment for your pet during oxygen therapy. We have two models: PureVent 5L Oxygen Concentrator: This model has a maximum flow rate of 5 liters per minute, which is required for the Small and Medium Oxygen Cages. PureVent 10L Oxygen Concentrator: This model has a maximum flow rate of 10 liters per minute, which is required for the Large Oxygen Cage.