We are getting in some serious testing this week! These run at about 2000* F for over 500,000 cycles. At that point we tear them down and evaluate the parts. Even after that kind of abuse, they are still ready to go for another round. #test#testing#madeinamerica#michigan#heat#glow#glowing#tial#madetowin#thebestintheworld .............. CORRECTION: This unit has now been over 1.5 million actuations, and is still going strong. We have don't it so many times now the counter unit is broken, so there is probably more than 1.5 million. We are replacing the testing equipment and going another round.