The Rasmussen 30" Black Alterna Ventless Uniform FireBalls Double Sided (DF-AFB30-BL) add a sleek, modern look to ventless fireplaces, providing a stylish alternative to traditional gas logs. Made from durable, heat-resistant ceramic-bonded refractory material, these double-sided fireballs are crafted to withstand high temperatures, creating a fuller, polished appearance by concealing the burner. The bold black finish offers a striking contrast to the flames, making it a captivating focal point in any indoor space. Exclusively compatible with the Rasmussen Alterna Ventless FireBalls Burner (sold separately), this set combines function and style for a contemporary fireplace display.