I bought these thinking that I needed them due to my folding farm's heat issues. There's no way for me to use them because my bench is limited in space. Paid over $250 for all 4 but sadly enough, I do not need them. I have 2 of each (12" and 9"). $55 each for the 12" and $45 each for the 9" (or you can take all 4 for $190 shipped overnight).