Dunhill Red Lighter Flints are slightly wider than standard lighter flints and they’re specifically designed to work with your Dunhill Rollagas Lighter.
No other flints are wide enough and may jam in your lighter, the same way that Dunhill flints are too large for most other lighter brands and may damage your lighter.
Dunhill Red Lighter Flints are slightly softer than cheaper competitive flint products, so using a Dunhill flint will create a greater spark and will reduce the wear on the flint wheel. This will extend the time between servicing your Dunhill Rollagas Lighter.