The cylinder is about 6.3 cm (2.5 in) long, 1.8 cm (0.7 in) wide, round at one end and narrow on the other. The wall thickness of the charger is about 2 mm (about 1 / 16 in) to withstand the enormous pressure of the gas contained in it. Their internal volume is 10 cm3 (approximately 0.6 in ³）， Most brands contain 8 g N2O under pressure. Used chargers cannot be refilled, but 100% recycled in the presence of a steel recovery plan. Nitrogen oxide is used because it is easy to dissolve into cream and does not cause cream oxidation when in a can. Cream must have at least 28% fat to produce fresh cream with a distributor.