Product review (5 stars): Received four blade chopper, still works.
In 2/2017 I received this part correctly labeled  (Whirlpool 8268383) in a Whirlpool Factory Parts bag, sold by Amazon (not third party), but it contained the four blade chopper. It still fits exactly the same and is high quality, so if you receive a four blade chopper, don't worry and don't return it.