Product review (1 stars): Does not physically match the original Whirlpool filter.
I ordered these as a replacement for Whirlpool filter 439701 as stated in the product description. However, when I tried to install it, it would not fit.  It is keyed differently and is a bit longer than the original Whirlpool filter.  I am not sure this will be a problem for others, but I wanted to let anyone else ordering to be aware of the differences between the Waterdrop and Whirlpool filters.  I have attached photos for reference.