The Rasmussen 20" Black Alterna Ventless Uniform FireBalls Double Sided (DF-AFB20-BL) bring a bold, modern look to ventless fireplaces, offering a sleek alternative to traditional gas logs. Made from durable, heat-resistant ceramic-bonded refractory material, these double-sided fireballs are designed to withstand high temperatures, concealing the burner for a fuller, polished appearance. The deep black finish creates a striking contrast with the flames, enhancing the ambiance of any indoor space. Exclusively compatible with the Rasmussen Alterna Ventless FireBalls Burner (sold separately), this set combines contemporary style with functionality.