Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does this fit Model # 54100R?Thank you-
Document: i have an OLd ham-beach blinder (probably from the early eighties) and it fit! couldn't find this gasket anywhere. my model was # 600-1. Hope this helps!
The blender gasket fit my old Hamilton Beach model well. It is not as thick as the original, which I caulk up to cost savings measures, but it is pliable which I would expect.
It is a little small. I tried trimming it and was able to get it to work, sort of, but it sometimes leaks. I tried some others..it seems the replacement gaskets just don't fit this model of blender .
It fit my older model perfectly. I have only used it twice, however, and there is a tear/crack in it already! I had the old gasket for years! Would not recommend this product - very cheap material.
The gasket fit perfectly, and it was a lot cheaper than gaskets from Hamilton Beach. (My old model wasn't listed on the Hamilton Beach site and I was reassured that the Amazon site said the gasket fits most blenders.)
I have a Hamilton-Beach model 722-6. I ordered this gasket in hopes that it would fit and was overjoyed when it did. My joy turned to sorrow when I operated the blender only to find liquid gushing all over my countertop from the bottom of the blender jar. I double-checked my assembly job, and it was fine. I don't really understand why the gasket isn't doing its job!
If you need a replacement gasket for a mid-to-late '70s model Hamilton Beach blender, this is the one to get. It fit perfectly for my Model 653, which is so old, it must be collectible by now. So glad to have this great blender with its glass jar back in business. I hesitated to order, since some folks said this gasket was too thick, but it's just right for my unit and it makes a snug fit when all the pieces are assembled.
I've got an older (30+ years) Hamilton Beach model 640-4 blender. Had to buy a new cutter assembly recently and decided to get a new gasket also. Some reviewers said this didn't fit their blenders, but for mine this is an exact duplicate of the original. Fits perfectly, plus it's nice and soft and pliable unlike the old, nearly mummified one it replaced.
Because lee lopes posted a review about this gasket, I purchased one. In that review, it was stated that this particular gasket fit a model 600-1. My blender is a 1984 Hamilton Beach Scovill, model 600-2. I took a chance that this gasket would also fit my blender, and it does! I am also happy to report that it was shipped immediately and I received it very quickly. Thanks!
I ordered this gasket ring, thinking it would fit my Hamilton Beach Blender. What I unfortunately neglected to do was check the Model Number of my blender. Mea Culpa. Before you order this item, make sure it will fit your blender. This gasket is not a universal part. If you have questions, call 800/851-8900. If I'd done this I could have prevented a near accident in my kitchen as this gasket split apart and was driven up into the blender jar.
Answer: I looked at that model and it looks like it will fit.