The mold conversion kit contains a mold peg, a washer, and a lag bolt. The mold peg is fastened inside a mold to hold the oil tubes which are used in the Candlefun candle carving system. The molds sold by Candlefun are already converted to hold the oil tubes. The conversion kits are for use by candle carvers who already own molds but want to start using the Candlefun system. Molds have to be at least 1.75" at the bottom of the mold (top of candle) for the conversion kit to work properly.