Yaley Wicks are a "must have" for all your candle projects. When making candles, be sure to select the correct size. & Clip Prewaxed Wire Medium 9" 6pc- Pre waxed 9" zinc core wire wick with 20mm clip. Zinc core wicks burn the coolest of all cored wicks and offers the most rigidity, most effective in parafin wax. For candles 2" to 3" in diameter. Lead Free, Not recommended for creme, soy, crystal or beeswax candles.