Bedbug eliminating balls contain a patent pending repellent to drive bedbugs away. Once activated, each ball creates a 9-ft. radius of protection. Twist to open, then place behind beds and furniture or in your suitcase or car. Infused with essential oils for a light, refreshing scent. Chemical free, pet safe. Set of 3 for 180 days of protection. Plastic. 1.5" Dia.