I needed a small raku kiln for experiments. I made this one because I need to take a small kiln for demonstrating some techniques for a teaching video. I had a roll of 8" wide 2" thick ceramic fiber that was a gift from a former student who worked at a refractory supply in Montana. I have had it for almost 15 years.The jacket is made of 16" wide flashing. The fiber is treated with rigidizer to contain the airborne fibers. Will fire it up in the morning to seal it.