Appalachian Wood Stove Door Gasket (5/8" x 7 FT). Part: 6F58. The door gasket creates a seal between the main door and the body of the unit. You should inspect this gasket regularly. If the door gasket does not seal properly, you may have adifficult time controlling the burn,andsmoke/flue gas may enter the room. If the gasket is damaged it should be replaced!