UK cylinders have the BS 341 No. 3 fitting which is compatible with the Max Dog regulator. EU
In the EU, Gase-Dopp in Germany sell full, steel cylinders of Nitrogen across Europe. While Exit has had these cylinders delivered to the Netherlands, one recent report suggests that delivery is country-specific (and does not, for example, include Italy).
Note: A German cylinder weighs 4.8 Kgm full, and has gas at a higher pressure (200 Bar/ 2900 psi), so the 2 liter cylinder contains 400 liter of compressed nitrogen/ ‘Stickstoff’ which gives a flow time of ~30 minutes (at the optimum 15 liters/ minute). The MDB or ‘Maxx Hund’ regulator can accommodate this higher pressure.
Balloon Time kits from Worthington have long been available around the world as a cheap, disposable source of helium gas for party balloons. They have been sold from online stores such as Amazon, Argos, Tescos and Spotlight.
In 2015, however, Worthingtons announced that their disposable helium cylinders may now contain up to 20% air (ie. up to 4% oxygen). This mixed gas can still enable balloons to float, but is unsuitable as a hypoxic death gas source. This gas source should NOT BE USED by those seeking an hypoxic death