6-Pack Sealing Gaskets 3.2 inch/8.3 cm Rubber Gaskets O-Ring White Replacement Parts for Ninja Professional Blenders BL660 BL770 BL780…

It exactly fit and works perfectly. The included tool makes it so much easier.

These rings are perfect for my Ninja blender. I love the tool that came with them it makes removing the ring so easy.

Fits perfectly!! I have used it twice already and there were no leaks.

I bought this to replace the old Yucky one that was in my ninja blender, and although the size is a little bigger than the real thing, it seems to work.

My Ninja blade attachment was leaking. My guess was it was the gasket. I ordered this gasket kit. The gaskets were a perfect fit. The kit comes with a small pick to pull out the old gasket. Was very easy to do. The base no longer leaks. I would recommend this kit.

Fits perfect in my blade cap. Thick enough to seal and was easy to install. Doesn't make anything noisy and seems durable.

The quality is inconsistent and the tool was broken when I received it. Are your quality systems that poor? The seals look like great quality, the size was correct. But 3/5 times I've used this it has leaked! The photo shows the latest this morning. what a mess on my new tile grout! Not feelin' it.

The 10cm gaskets work perfectly with my Ninja model BL450-69 (purchased several years ago at WM)I've tried soaking/cleaning the gaskets when they get gross and it hasn't worked, easier to just replace the gasket every couple months (I make 1 smoothie every morning). In between replacing, after making smoothie I rinse the blades & place the blade thing (blade-side down) in a small tupperware container to help any residual water to drain off.I forgot that a gasket removal tool came with these so I actually might start removing the gasket to rinse/dry after each use. Will see if it causes wear faster from daily removing, but the tool is much easier than using a fork like I was doing!