1″ wide x 10″ long (25 mm x 254 mm) kiln post. Kiln shelves are separated with posts of various lengths. Having an assortment of posts 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.