With BaByliss’s gas curling iron you can curl your hair without a disturbing cord. You are also completely independent of having an electrical outlet nearby - you can therefore have your gas turbine with you everywhere. The gas cylinder has a diameter of 19 mm. with ceramic coating. There is about 4 hours of use. When the gas goes off your curling iron, just buy new cartridges for your BaByliss gas turbine.Details:Gas gurler19 mm. diameterCeramic coatingUp to 200 degreesContains gas enough for 4 hours of use