1.5″ wide x 9″ long (38 mm x 228 mm) kiln post. Stack kiln shelves with posts. You will find that loading a kiln is like doing an interesting puzzle. An assortment of lengths will give you maximum use of space inside your kiln. Use posts of the correct length to avoid placing a shelf opposite a heating element. Can be fired up to cone 10. Carton pricing available. (24 in carton) The posts shown here are of random lengths.