Explanatory notes
… not proper to heading 73.23, such as : Flat irons (gas, paraffin (kerosene), charcoal, etc., types, but not … fuel (frequently with a small pump), or a replaceable gas‑filled cartridge. In some cases, a soldering or branding … checking or calibrating instruments (e.g., marking gauges and punches, centre punches and scribers, calipers …