An M4 is a small, lightweight portable oxygen cylinder used for ambulatory patient oxygen, EMS and first-responder kits, and emergency oxygen supplies. Its compact size, about 9 inches tall, makes it easy to carry in a bag or mount to a wheelchair. All Safe Global supplies M4 cylinders at wholesale to medical distributors, EMS services, and home care providers.

An M4 cylinder holds about 4 cubic feet, roughly 113 liters, of oxygen at 2216 PSI. Duration depends entirely on the prescribed flow rate set by a clinician, so the treating provider determines run time. As a compact portable size, it is designed for shorter, on-the-go use rather than stationary supply.

The M4 uses a CGA870 post valve, the pin-index safety standard for small medical oxygen cylinders. A conductive-yoke oxygen regulator or conserver clamps onto the post and aligns with the pins, so only an oxygen regulator will fit. This keeps the connection specific to medical oxygen for safety.

Yes, the M4 is an aluminum cylinder, which keeps it light for patients and responders who carry it. Aluminum also resists corrosion and is commonly specified for medical oxygen service. Its low weight is a key reason the M4 is popular for ambulatory and emergency use.

These cylinders ship empty, and medical oxygen is filled by a licensed medical gas supplier. In the US, medical oxygen is a prescription product for patient use, so filling and dispensing are handled by qualified, licensed providers. All Safe Global supplies the empty cylinders at wholesale to those medical and EMS accounts.

Yes, All Safe Global supplies M4 medical oxygen cylinders at wholesale, with pricing by quote to match your volume and account terms. Use the request a quote option and we will return pricing and lead time. Volume programs help medical distributors and EMS services keep cylinders in rotation.

Yes, these are new aluminum cylinders, DOT and TC approved and rated for medical oxygen service. New cylinders give your accounts a full service life and a clean requalification baseline. We provide documentation to support compliance.

Yes, All Safe Global performs hydrostatic testing and requalification in our DOT-authorized facilities, so medical accounts can keep cylinders in service safely and longer. Recurring requalification avoids downtime from lapsed test dates. We can set a testing schedule around your oxygen cylinder fleet.

Store oxygen cylinders upright and secured, away from heat and open flame, and keep oil and grease away from the valve and fittings, since oxygen accelerates combustion. Handle them gently to protect the post valve. These are standard safety practices for any oxygen cylinder.

Portable medical oxygen cylinders come in a range of sizes, commonly M2, M4, M6, M9, and larger, holding progressively more oxygen. The M4 is a compact size for short, ambulatory use, while larger cylinders extend run time for longer needs. We can supply the sizes your accounts require across the range.