PH PandaHall 6pcs High Alumina Kiln Posts 2x1.6x1.2 Inch Square Ceramic Shelf Supports Review (2026)

What these kiln posts are for

Kiln posts are used to prop up kiln shelves at a set height inside the kiln chamber, which lets a potter stack multiple firing levels rather than using only the single level at the bottom of the kiln. This set includes six posts, each measuring 2 by 1.6 by 1.2 inches, made from high alumina ceramic material. The rectangular block shape rather than a round post means each one can be set on a different face to change the support height slightly, giving some flexibility in how much clearance a shelf gets above the pieces below it. Six posts is enough to support two shelf levels using three posts per shelf, which is the typical arrangement for keeping a shelf stable and level during firing.

Materials and durability

High alumina ceramic is a common material choice for kiln furniture because it holds its shape and resists deformation at the high temperatures reached during firing, unlike softer materials that can slump or crack under repeated heat cycles. This makes high alumina posts a durable choice for potters who fire regularly, since they are built to withstand many firing cycles without losing structural integrity. The hollow rectangular shape used here keeps the posts lighter than solid blocks of the same size would be, while still providing enough strength to support the weight of a loaded kiln shelf above it during a normal firing cycle.

Sizing and shelf clearance

At 2 by 1.6 by 1.2 inches, these are relatively short posts compared with taller kiln post options on the market, which means the clearance created between a piece and the shelf above it will be limited to a few inches at most depending on which face the post rests on. This size works well for shorter pieces like small bowls, tiles, jewelry components, or test pieces, but it will not provide enough headroom for taller vases, sculptures, or other pieces that need more vertical clearance under a second shelf. Potters working mostly with low-profile pieces will get good use out of the compact footprint, since it takes up less kiln space than taller posts while still elevating a shelf enough to allow airflow around pieces below.

How airflow and post placement affect firing

Proper elevation between shelves and pieces below them allows heat and air to circulate more evenly during firing, which helps reduce firing defects like blistering, cracking, or uneven glaze results that can occur when air is trapped or heat distribution is uneven around a piece. Using posts at each corner of a shelf, spaced to match the shelf size, keeps the shelf level and evenly supported rather than tilted or unevenly loaded on one side. Because these posts are shorter than some alternatives, potters loading a kiln with a mix of taller and shorter pieces may need to combine this set with taller posts elsewhere in the kiln to get consistent shelf spacing throughout.

Who should buy these kiln posts

This set suits potters and glass fusing hobbyists working with smaller, shorter pieces such as test tiles, jewelry components, small bowls, or other low-profile work where a compact post height is sufficient clearance. It is also a reasonable pick for potters wanting to add extra posts to an existing kiln furniture collection without spending on taller, pricier options. Anyone regularly firing taller vases, figures, or sculptural pieces that need more vertical space under a second shelf should pair this set with taller posts or choose a taller post option instead, since the short 1.2 inch minimum height will not provide enough clearance on its own for larger work.

Frequently asked questions