Product review (4 stars): Genuine OEM, but only 1 shipped
Genuine Aprilaire water pad. Fits perfectly for Aprilaire 600. This is supposed to be a 2 pack, but only one was in the box when delivered. Called Amazon and they took care of it. Though started out by telling me to return and re-order. Don't understand why not just send another. Can't return because the one I received is installed. Lost a star for the order experience.