Skew Refractory (Edge Skew Brick) there is no limit to which a refractory brick can have different shapes and sizes to suit a particular design or lining requirement. Production of refractory shapes depends upon the design and size of furnaces or other service constructions where such refractories are to be used. Numerous shapes and sizes of refractory bricks are produced to meet the specific lining requirements of the straight-walled, cylindrical, arched, dome, and other special types of construction work besides the shapes like wedges, keys, sleeves, nozzles, burner blocks, tiles, etc.