Brand new replacement heater element gasket set for Midmark M11/M9 autoclaves. Each set includes the two gaskets required to install one heater element, manufactured in the USA from the same precision gasket material found in the original Midmark heater element gasket. What's Included: 2 heater element gaskets — one complete set for one heater element. Installation Notes: Replace gaskets whenever the heater element is removed or reinstalled. Clean mounting surfaces thoroughly before installation. Install gaskets with the grooved side facing the chamber. Torque heater element nuts to no more than 25 ft-lbs (34 N·m).