This Thermacell C-2 Butane Fuel Cartridge Refill 2-Pack is a great addition to your mosquito repellent kit. The refill is compatible with the Thermacell C-4 model and is perfect for outdoor activities like camping and hiking. The EPA Registration Number is 71910-2 and the brand is Thermacell, a trusted name in insect repellents. The refill is designed for easy use and comes in a convenient 2-pack for added mosquito protection. Whether you're in the great outdoors or just enjoying a peaceful day at home, this Thermacell C-2 Butane Fuel Cartridge Refill 2-Pack is a must-have item for any mosquito repellent kit.