Replacement Parts for Nutri Ninja Blender Blade Assembly Fits Nutri Ninja BL660 BL770 BL740 BL771 BL772 （6 fins）

It works well, but after only one week of use, two screws rusted on the bottom where there is a metal piece...so I guess it won't last that long

The product so far is holding up. I will update in a few months with any changes. But so far seems like a good product for the price.

I read the reviews, but I thought I would be one of the lucky ones to get a new blade assembly that didn't leak... I was so wrong. My breakfast shake sprayed all over the wall behind the blender and my counter, luckily I managed to avoid being sprayed with it too...I guess you get what you pay for. It looks like the original, but it doesn't perform like it... so I will be paying more money and getting the real deal. This one has been returned. I am so disappointed.

This worked great! UNTIL IT CRACKED. The piece of the base cracked a hairline crack that started leaking about a week ago and I thought I was over filling my blender cup until I finally had it and looked closer and realized it cracked in the housing under the blade ! I’m so sad

I was a little skeptical based on some of the negative reviews, but this lid is perfect. I replaced my cracked ninja lid that I've been using for 10 years. I made sure to check my model and order the right lid, but this thing is better than the original. The fit it super tight and no leaks, plus makes my smoothie perfectly smooth.

Scary. Leaked on first try. Right number of prongs but noisy and unsteady spin.

perfect for my Ninja. It's nice to have an extra one for both of us to enjoy a smoothie in the morning without having to wash the blade in between cups.

I will say, this blade seals to the cup better than the original. I only used this for a few months before the gasket broke. I manged to order new ones on Amazon but it was a little disappointing.