Herringbone fireplace fireboxes built by Superior Clay Corporation are faced with 9″ x 1.25″ firebrick in a vertical Herringbone pattern. The fireboxes are shipped in three sections – two covings and the fireback (inner hearths are also available) and are easily erected at the job site. The pre-made fireboxes save master masons much time and aggravation and allow less experienced masons to build beautiful Herringbone fireboxes.