Fuel Cells are a clear, disposable candle with virtually no cleanup. Once the candle is finished burning, only the plastic canister is left to discard. Both sizes have a built in snuffer and will self extinguish, should the candle tip over. Fuel cells are very popular in the restaurant industry, but can be used anywhere a disposable candle is required. 30 hour fuel cells 48 pcs/cs Size: 2 3/8? (D) x2 3/8? (H)