**DOT Standard Aluminum Oxygen Gas Cylinders, 4.6L (ME-size), Pin Type Aluminum O2 Cylinder for Oxygen Therapy Systems** These aluminum oxygen cylinders are designed to meet the DOT standard and are ideal for use in medical applications such as home oxygen therapy, emergency medical services (EMS), pre-hospital care, hospitals, nursing homes, clinics, and other healthcare facilities. The ME-size model has a capacity of 4.6 liters, with an outer diameter of 111 mm and is suitable for various oxygen delivery systems. **Main Specifications:** - Cylinder OD: 111 mm / 4.38'' - Working Pressure / Test Pressure: 139 bar - Wall Thickness: 7.1 mm - Height: 645 mm / 25.4'' - Net Weight: 3.6 kg / 7.8 lbs - Color: Green silvery - Handle: Black plastic handle - Connecting Thread: 3/4-14UNF - Manufacturing Standard: DOT-3AL, EN1975, etc. - Material: Aluminum Alloy 6061 - Lifespan: Over 15 years **Notes:** Our sister factory can also produce a wide range of aluminum gas cylinders with: - Water Capacity: 0.5L ~ 50L - Outer Diameter (OD): 60mm ~ 250mm - Working Pressure: 150 bar / 200 bar - Manufacturing Standards: DOT-3AA, ISO 7866, etc. These lightweight and portable cylinders are perfect for both professional and personal use. They are made from high-quality aluminum alloy and undergo rigorous manufacturing processes including punching, drawing, heat treatment, CNC flow forming spinning, and anodic oxidation on the inner surface. This ensures durability and safety when filled with various gases, such as rare gases, high-purity gases, standard gases, and special gases. Their applications span across chemical, electronic, medical, gas, and coal mining industries. **Product Table:** | Item Model | Water Capacity (Lts / Cu in) | Outside Diameter (mm / in) | Length (mm / in) | Weight (kg / lbs) | Working Pressure (bar / psi) | |------------|-----------------------------|----------------------------|------------------|-------------------|-----------------------------| | M2 | 0.3 / 0.6 | 63.5 / 2.5 | 145 / 5.7 | 0.3 / 0.6 | 153 / 2216 | | M4 | 0.7 / 1.5 | 81.5 / 3.2 | 221 / 8.7 | 0.7 / 1.5 | 153 / 2216 | | M6 | 1 / 2.3 | 81.5 / 3.2 | 300 / 11.8 | 1 / 2.3 | 153 / 2216 | | ML6 | 1.2 / 2.5 | 111 / 4.4 | 198 / 7.8 | 1.3 / 2.9 | 139 / 2015 | | ML7 | 1.4 / 3 | 111 / 4.4 | 231 / 9.1 | 1.5 / 3.2 | 139 / 2015 | | M9 | 1.7 / 3.8 | 111 / 4.4 | 277 / 10.9 | 1.7 / 3.7 | 139 / 2015 | | MD | 2.9 / 6.4 | 111 / 4.4 | 424 / 16.7 | 2.4 / 5.4 | 139 / 2015 | | M22 | 3.9 / 8.5 | 133 / 5.2 | 414 / 16.3 | 3.7 / 8 | 153 / 2216 | | ME | 4.6 / 10.2 | 111 / 4.4 | 645 / 25.4 | 3.6 / 7.8 | 139 / 2015 | | M60 | 10.5 / 23.2 | 184 / 7.25 | 582 / 22.9 | 10.1 / 22.3 | 153 / 2216 | | M90 | 15.7 / 34.7 | 184 / 7.25 | 828 / 32.6 | 13.7 / 30.3 | 153 / 2216 | | M122 | 21.4 / 47.1 | 203.2 / 8 | 919 / 36.2 | 17.9 / 39.5 | 153 / 2216 | | M150 | 28.9 / 63.7 | 203.2 / 8 | 1194 / 47 | 22.1 / 48.8 | 139 / 2015 | **About Us:** We are a professional manufacturer and supplier of gas cylinder regulators, oxygen flowmeters, medical oxygen regulators, oxygen kits, oxygen gas cylinders, oxygen intake devices, gas O2 valves, medical pin index valves, medical gas supply system products, gas cylinder trolleys, gas O2 outlets, ceiling medical pendants, and more. **Advantages We Offer:** - Original Manufacturer: Equipped with advanced machinery such as punch machines and CNC machines. - Large Output Capability: Can produce over 50,000 units of medical oxygen flowmeters per month. - Quality Control: ISO 13485 certified; all products are tested before leaving the factory. - Cost Advantages: Benefit from professional production and economies of scale. - Series Variety: Multiple models to suit different international standards. - Small Orders Accepted: Minimum Order Quantity = 50 pcs. - Export Experience: Over 5 years of exporting experience. **Notes:** - Various types of O2 flowmeter regulators, steel/aluminum O2 gas cylinders, O2 gas cylinder valves, cylinder caps, and steel valve guards are available upon request. - We cater to a wide range of needs, including high-pressure steel gas cylinders (O2/Helium/Argon/CO2/N2) ranging from 0.2L to 68L at 15Mpa/20Mpa, as well as ISO 3807-1/2 dissolved acetylene cylinders (2L–60L), and high-pressure aluminum gas cylinders and related gas valves and regulators. **Contact Us:** If you have any questions or need further information about our gas cylinders or related gas items (gas cylinder valves, gas regulators, medical hospital central oxygen system products), feel free to contact us anytime. **Key Contact:** Ethan Liu (Export Manager) Mobile: +86-153 5606 5235 Website: [http://www.cbm-tech.com](http://www.cbm-tech.com) | [http://www.cbmcare.com](http://www.cbmcare.com)

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August 24, 2025