Product review (5 stars): canner element kit- you need one
the bath type canning pot is so big it  nearly comes in contact with the edge of the stove, the top of the stove surface gets so hot when canning using the standard element it just does not seem safe. The canner element kit raises the canning pot further off the stove, still gets close to the edge of the stove, but it is above it, This also helps with heat distribution. When done, the canner element is easily removed and stored with other canning supplies and the standard element is replaced.  This is a practicle  item that works very well, if you can food (even with a pressure cooker)  you need one of these.