Blender Blade Assembly 6-Fin Extractor Blade Replacement Parts for Ninja BL660 BL663 BL663CO BL665Q BL740 fits 16 oz Blender Cup

I bought this to replace my Ninja BL660 16 oz nutri blade. It looked identical. I found the 6 gear shape being slightly different and caused to make a louder noise when used. So I put the old gear part on the new blade. That cut the noise down. Good thing I kept the old blade part.

Got my replacement & it works great so I updated my review. No problems & works great. Waiting for replacement. Original top leaks when making my morning smoothie. I’ve tried this for two days now & no matter what I try, it leaks. Returning it for a replacement & will update review. Bought this because my original ninja top cracked on Monday. I used it every day for 4 or more years, so I would say it was very durable. Went on Amazon as I wanted a quick replacement.

This replacement blender part failed. Had it for approx 3 months and it worked fine till yesterday and now liquid spills thru a stress crack in the plastic. waste of money.

Not as good as the Ninja original blade cap, but it ultimately got the job done. I really had the press down and twist the blender cup to get it engage and blend. When it was done it was a BEAR to unwise the cap, and I'm not a delicate woman. It was legit stuck and thought I might have to toss the whole contraption along with my avocado crema!

Needed a second blade for our Ninja but should’ve purchased the name brand. This blade is awful. It makes a terrible sound and today there’s a burning smell so it must be affecting the blender motor. A complete waste of money.