Product review (5 stars): OEM Aprilaire product when sold by Amazon
I've seen other reviewers say this is not the authentic Aprilaire product, I think it must depend who the seller is.  I bought the 2 pack that was shipped by and sold by Amazon, and it was the authentic OEM product (see the pictures with the review).  The quality was great and it was much cheaper than buying it locally.  I am very happy with my purchase, and would buy again.