With only a handful of manufacturers in the world producing compressed gas cylinders, ASDL sought to find the best and most reliable source. We ended up in Austria, with a company famous for producing automotive airbag inflators as well as life vest inflators for both commercial and military aircraft.ASDL CO2 cartridges are without doubt, the finest available today. While most 16 gram cartridges contain 14-16 grams of gas, ASDL cartridges specified at the highest precision available and are guaranteed to contain 15.5-16.0 grams of gas. Cartridge threads are precision roll-formed to guarantee both size and thread strength. Unique, recycled linen paper labels insulate as much as 2x better than traditional cylinder labels and also allow for easier recycling of the cylinder after use.ASDL has developed a proprietary impact resistant helmet for the cartridges. Research showed that the number 1 and number 2 cause of CO2 regulator failure are damage to the gasket which seals to the cartridge and destruction of the threads in the regulator. Both of these failure modes are caused by using a cartridge with damaged threads. ASDL Impact Helmets guarantee perfect, clean threads when you need to use the cartridge, while also allowing the threads to be lubricated with a high-viscosity silicone grease. The grease ensures smooth assembly and an airtight seal once the cartridge is punctured.Impact helmets also protect cartridges from damage or puncture in seat bags and toolboxes.Contains 2x 16 gram Cartridges and 2x Impact Helmets100% Recycled packaging and recycled linen paper cylinder labelsPlease Recycle Cartridges after use!