Citronella is a proven, all-natural, insect repellent made from the leaves and stems of the lemongrass plant. It repels insects by masking the smells biting insects are attracted to. These citronella oils are blended with fine fragrances to smell as good as they look. Each one has 3 wicks for the maximum scent throw to keep bugs at bay, have an 80 hour burn time, and measure 4 3/4˝ wide x 3 1/2˝ high.