The oil tubes come in two sizes... 3.25 and 6.25 inches long. The oil tubes are sold in sets with the wickholders and wicks. The tubes are made of plastic. The wickholders are made of two parts: plastic and heat-resistant glass... the glass piece holds the wick and blocks the heat of the flame from reaching the plastic. The wick is made of fiberglass and is a lifetime wick... it does not have to be replaced.

ALL Candlefun molds can accept the shorter oil tubes, but the 9" and 12" molds CAN accept the longer tubes. The longer tubes let in a bit more light and hold twice as much candle oil. The shorter tubes can hold enough oil for about 5 hours of light, and the longer tubes can hold enough oil for about 10 hours.

Smokeless, odorless candle oil should be used iwith the tubes.