The Ready-Rack is a new accessory for the Invacare HomeFill II Oxygen System. The Ready-Rack allows the HomeFill II System to sit directly on top of the oxygen concentrator instead of using a HomeFill table. The Ready-Rack takes the HomeFill one-step closer to being an integrated oxygen system. It is portable and requires no assembly, simplifying patient set-ups for providers, and making travel with the HomeFill system easier for patients.