Add contemporary style to your outdoor fire pits with Outdoor Greatroom Company Arctic Ice Reflective Crushed Glass. This crushed glass is intended for use in Crystal Fire Burners and reflects the dancing flames, creating a unique focal point and ambiance for your outdoor space. The amount needed to fill each crystal fire burner varies: 10 lbs. is needed for CF-20 and CF1224 burners while 20 lbs. is needed for CF-1242 and CF-2424 burners.