I knew instantly when I rotated the blade that it is not as good as the one that came when I originally bought the blender. But for this price, it does its job.Very difficult to get on & off Ninja. Would not recommend. Seems too large for Ninja, too thinkY’all need to take my advice and put better bearings in the blender assembly. This will be my 2nd set. I use them everyday once a day. The bearings are getting loud already after 60 days. You are being wasteful to our Mother Earth because I can bet that the majority of people just end up throwing these out sooner. The plastic holds up fine so y’all don’t have much that needs to be improved. I’d rather pay an extra 3-6 bucks for the better bearings.Great thing to buy when your magic bullet supplies get old. I got the 32 oz. Cups which I'd really nice because I'd alway fill the old ones to the brim to get an adequate breakfast. The blade is nice and sharp. It comes with 2 extra gaskets which should come in handy, my old blade/gasket would leak. The only downside is the hole is too small to drink anything thick through, especially when you are speeding to get to work. Overall will buy next time I need new equipment.We use our bullet A LOT! We’ve broken or lost half of our cups. So we got these as a replacement. They are nice and big, great for making smoothies for 5 kids. And here are the blades side by side. So far we’re pleased with our purchase.This actually came after then it said it fits my nutra bullet perfect which made me really happy because I didn’t want to have to buy a new one when all I needed was the cup. I like that these cups have measurements on them there a great help and the extra gasket and grommet for the blender itself was nice mine was actually missing one. The price is unbeatable for what your getting and not having to buy a whole new blenderPerfect replacement for authentic NutriBullet products, I cannot recommend these enough!Amazing value for everything that comes with this. It is just as thick as the authentic NutriBullet products, but honestly it might even work better because it has the liquid volume indicator on it. I have no complaints whatsoever, and would recommend this over the real Nutribullet products any day because of this valueThe package came very well put together and wrapped. I'm the first to complain and make sure the product is right if it's not working, and this is a very nice replacement for the Nutribullet cups and blade. You get a few extras i didn't really think much about, but it's nice to be able to replace the various items.I would buy from them again in the future