Refill Single pack - Thermacell
ThermaCELL Mosquito Repellent Refill provides 12 hours of repellency (3 mats and 1 cartridges). To continue to repel mosquitoes repellent mats should be replaced after 4 hours of use. Butane cartridges last up to 12 hours each. Refills fit all ThermaCELL mosquito repellent models.