Citronella Coils in Terracotta Holder. Citronella is used to fend off insects without killing them. The coils give off a scent that keeps insects at bay, this all natural and animal friendly insect repellent is perfect to use in the garden during the summer months. Set consists of terracotta holder and 10 citronella coils. Burning time 6 to 12 hours per coil. Packaged in gift box.