Refill 4 pack - Thermacell
ThermaCELL Mosquito Repellent Refill value pack provides 48 hours of repellency (12 mats and 4 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.