Description: 【Material】: Oxygen Tank Backpack is made of oxford cloth material, is durability and waterproof, long service time 【Universal Fit】: Oxygen Tank Backpack is Compatible with A, B (M6), C (M9), D, M2, , and M7 oxygen tank 【Comfortable Carrying】: Features a double shoulder backpack design with adjustable padded straps, chest strap, and top handle to evenly distribute weight for stable and comfortable transport 【Tangle Free Access】: Oxygens Cylinder Holder Bag is Equipped with four dedicated outlet ports to allow multiple oxygen tubes or regulators to pass through easily, preventing tangling and ensuring uninterrupted air flowing 【Shock Protection】: Thickened internal padding provides comprehensive shock absorption and collision protection for your oxygen cylinder during travel or outdoor activities Specification: Material: Oxford cloth Size Chart: 52cmx25cm/20.47inchx9.84inch Package Includes: 1x Oxygen Tank Backpack  Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.