The Invacare HomeFill Oxygen System offers providers a number of different cylinder options to better meet their patients needs. To make ordering easier, Invacare bundles many of these options into HomeFill kits which can be ordered using a single item number. The Invacare HomeFill Oxygen System kit includes a HomeFill compressor, ready rack, your option of cylinders and some kits even include a stationary concentrator or conserver as well. Whether you need integrated conserver cylinders, post valve style cylinders or something else, Invacare has a HomeFill kit to meet your patients needs. Invacare HomeFill System Kit, ML4 Conserver CylinderIncludes HomeFill Compressor, Ready-Rack, two ML4 cylinders and convenient shoulder bag The HomeFill System Kit bundles your favorite HomeFill System options and accessories into one, convenient and easy-to-order kit. Black, nylon bag is discreet, lightweight and washable Lightweight conserver weighs only 3.6 lb., excluding bag Pulse setting 1-5 and 2 LPM continuous flow Added convenience of filling oxygen on own time Ready-rack easily attaches to Invacare Perfecto2 Series Concentrator Cylinder Filling Times: 60 min.