The Rasmussen 20" Natural Alterna Ventless Uniform FireBalls Single Sided (AFB20-NA) bring a refined, contemporary aesthetic to any ventless fireplace, offering a stylish alternative to traditional gas logs. Crafted from durable ceramic-bonded refractory material, these fireballs are heat-resistant and designed to conceal burners effectively, creating a fuller, visually appealing look. The natural finish, achieved through a unique staining process, gives each fireball a distinct appearance. Specifically compatible with the Rasmussen Alterna Ventless FireBalls Burner (sold separately), this set enhances the modern charm of your indoor space.