The Rasmussen 30" Black Alterna Ventless Uniform FireBalls Single Sided (AFB30-BL) add a striking, contemporary look to ventless fireplaces, serving as a sleek alternative to traditional gas logs. Constructed from heat-resistant ceramic-bonded refractory material, these fireballs are built to withstand high temperatures while providing a polished appearance by concealing the burner. The deep black finish enhances the contrast with the flames, making it an eye-catching focal point. Specifically designed for use with the Rasmussen Alterna Ventless FireBalls Burner (sold separately), this set is both stylish and functional for modern indoor settings.