Instruction: Answer the given question using the supporting document.

Input:
Question: Does it fit the old Oster Kitchen Center Blender jug?
Document: Our Oster Kitchen center is from 1986. This kit still fits! Only difference was the cloverleaf shaped lid instead of the square we have. No matter, we bought the kit to refresh the bottom seal. I'm getting another one for Mom, her blender is almost as old!
My Oster blender is 32 years old. The lid in this refresh kit is too big for my jug. It could be used in a pinch because it fits snugly on the outside the rim. Fortunately I still have my old lid. The base, blade and rings all fit perfectly although the base is not the quality of the original.
The old lid that came with my Oster blender was chipped. The filler cap (center piece) for some weird reason fell through the lid and fell onto the blades while I was using the blender. There is a design flaw there because the white rubbery part that takes up most of the lid is too soft and pliable that a bit of pressure trying to put the filler cap back in can effectively push it through. There was a remote chance that it could have turned dangerous.
My original black base cracked, and the center clear seal once fell into the blender, destroying it.Everything in this new kit fits exactly. The new lid is softer and seals well. The base is solid, and the new gasket works great. I put the spare in storage. What I didn't expect is that the blades spin faster now. The old bushing must have really been worn out. It's like a new blender now.
My old Oster blender has a new lease on life with this Accessory Refresh Kit. All the pieces fit perfectly! I thought I would need to purchase a new blender when the cap wore out...but not so much....very pleased with the results.
I used this kit to bring an old Oster blender back to life. The cover did not fit like the old one that fit inside the container. This cover fits over the outside of the container. So other than that all the other parts work great! Can't beat the price.
We recently bought a new beehive blender to replace the old Oster that I inherited from my grandmother. This kit allows us to use the old square jar with the new blender, although the lid didn't fit.Truthfully, the new round jar works better and holds more, but having an extra jar is definitely worth the price of this kit.
My son broke the glass jar on my years-old blender and threw everything in the trash while I was on vacation. I received the replacement kit (and a 5 cup glass jar) today and feel like I have a new blender. The blade I received is wickedly sharp.The old glass jar was round with a round cap. All new  clover-shaped  parts fit and operate perfectly. Bravo to Oster for interchangeable quality parts!
Lid fits tight once again. Nice to have the 2 oz measuring center cap too. Worth doing periodically to refresh a blender.
The kit was a perfect replacement for the items in the kit. Right after I installed the kit on my old blender... the blender motor burned out! I went out and bought a new Oster blender.
Answer: It fits a standard size Mason jar (not wide mouth) if that is any help. I don't know about the kitchen center specifically.