Factory Price Hospital Breathing Empty Portable Oxygen Cylinder for Home

Factory Price Hospital Breathing Empty Portable Oxygen Cylinder for Home. Patented Double-Way Design: Unique empty-inside packing with patent, no need to open lower valve for safety. Integrated Safety Valve: Combines pressure-reducing and safety valves for stable output and fancy structure. Portable Mini Size: Lightweight and compact design makes it easy to carry and move for home use. High Strength Material: Made of stainless steel with strong, tough, and collision protection features. Multiple Specifications: Available in 2L, 3.2L, 4L, 6.3L, 8L, and 10L major specifications.