The Thermacell Refill Value Pack includes 4 butane cartridges and 12 insect repellent mats, providing up to 48 hours of protection from insects. Made by Thermacell, a well-known brand in outdoor survival gear, this product is designed to keep you safe from bug bites during camping and hiking trips. With a model number of R4 and origin in Mexico, this product is a reliable and convenient solution for staying pest-free in the great outdoors.