Weierken24oz Cups Compatible with Nutri Ninja Auto IQ Series Blender, Pro Replacement Parts with 2 Type Lids, 7 Fins Extractor Blade, Compatible for BL450-30, BL456-30, BL481-30,BL487, NN100 etc

Cups work Great, but the blade made so much noise when we used it. The blade started putting off a brown powder on the inside of the machine. We could put in original blade, and it was quieter & no brown powder.Bought a second blade for Ninja

I wish I knew my Ninja food processor worked with these things years ago! These are awesome! Also the size is perfect for me. I like large smoothies.

It squeaks as you screw them on and sticks a little. Nothing leaks but it def isn't a smooth closure like the original.

I ordered because my 8 yr old blade house cracked. I didn’t realize how full mine was until I used this new one. Blends ice smooth in 10 seconds or less. Having extra cups for my protein shake drinking teen is a bonus.

Blade did not fit my ninja

Fits Ninja Maschine.

Don't wast your money. It does not fit the Ninja.

The blade attachment base won’t fit into the blender even though I verified the model numbers matched before purchase. The cups fit fine. I was disappointed, I was hoping for an extra blade attachment.

Factory quality

First one I bought died after three months. Bought another one as I thought it was just a fluke and I need the attachment. This one is now leaking and screaming just like the other one did and it’s only just over 2 months. Waste of money!!

This did not fit my ninja.

I like the blender cup and the tops. The part that blends it is very hard to get into the blender itself. It will work if I put the cup into it very tightly but then I find it hard to undo after it’s blended.

The original ninja lid replacement isn’t too bad. It’s flimsy and doesn’t always stay closed, but does seal well.The lid with the longer closure on it is garbage. It is NOT leak-proof whatsoever and doesn’t allow anything slightly thick to pass through. The opening is just way too narrow. I have to remove the lid completely to drink my smoothie at work (not at all why I bought this).I haven’t tried the blades but they do fit my Ninja machine, so I’m confident they’ll be okay.Overall fine if you don’t need one cup to be spill-proof when the lid is on.