Most of our original customers were furnished with a heat riser made from vermiculite board. Vermiculite board is fragile and disintegrates easily especially after heating.
We now ship the heat riser made from a compressed ceramic fiber material which has similar insulation qualities, but is significantly less fragile. If you need to replace your heat riser for some reason, please order this SKU.
This set of boards does not include stainless steel screws.