The Zippo Replacement Wick is built to keep your lighter burning at peak performance. It's made for Zippo Satin Chrome Windproof lighters. When the wick in your Zippo becomes black from carbon, that's when you know it's time for a replacement. Just pull the wick up with pliers until you see the clean part of the wick, then cut it off even with the top of the chimney and straighten it.
This replacement comes in a sealed package with full instructions on the back. Remember to read the instructions carefully and keep all flammable products out of reach of children.