Candle wicks are made of natural cotton threads, low smoke, no zinc, lead or other metals. Candle wicks for candle making size: 20cm in length. Application: perfect for soy candle making, beeswax, palm, coconut, paraffin and tea cup candle, etc. Note: please be careful with dosages of dye and scent when making candles, excessive dosages might have an influence on the burning effectiveness, causing smoke and reducing the ability of your candles to stay lit. Package Included: 25 pieces 20cm candle wicks.