Hanging citronella coil to keep insects at bay. Hang this set of 5 small all-natural citronella incense outdoors, light up on one end, and enjoy a long burn time, and a fragrant, floral smell. Citronella is a commonly-used insect repellent that is non-toxic to humans and animals. Citronella grass originated in southeast Asia but is now grown throughout much of the tropics. Stand not included. Small: Tan coil with black hanging thread. Each Coil's burn time approx. 36 hours. Also available in Large: Black coil with black handing thread. Burn time approx. 150 hours.