16 register have angularly disposed outward opening areas 21 which register with the secondary shoulders 20 on the extensions 16 of the pillars 12 as may best be seen by referring to fig5 and 7 of the drawings by referring again to fig1 of the drawings it will be seen that the upper end unit 11 is relatively thin and flat while the lower end unit 10 is of substantially greater thickness with the upper v shaped surface thereof having an enlarged cavity configuration 22 formed therein as also seen in fig3 of the drawings so that the overall mass of ceramic of the lower end unit 10 is not substantially greater than the mass of the upper end unit 11 by referring now to fig1 of the drawings it will be seen that each of the pillars 12 is provided with a series of uniformly vertically spaced openings 23 which are preferably triangular in cross section and disposed at an angle from horizontal and that a plurality of fitted lateraly projecting replaceable section pins 24 are disposed therein the section pins are directed generally towards a central axis to form a rack for the support of the ceramic ware.