Searching for 4100 dh/sl window parts

Take a look and see if our 26-122 could work in your window. The pivot shoe you are showing looks similar to our 15-135. See if you agree. This pivot shoe can be used with a Series 770 balance if you should also need to replace them as well. For replacement options on the gasket, we will need to see a photos of the cross section with dimensions. 

I've received your new pictures, but I'm afraid they don't tell me what your gasket is. I will need you to remove a sample and show us a clear picture of its end profile. We need to see the shape in order to identify a match.

Aha, perfect. This is just what we needed to see. I was able to narrow it down to one of two choices: our 58-171 or 58-182. The measurements for these are pretty specific, so I can't tell what you need based on just a tape measurer, but I'm confident it's one of them. Look over our dimensions and let me know what you think.

I received your photos, but I cannot tell what you have based on just a tape measurer. If you look at the store page for the two parts I mentioned, you'll see that the dimensions are very specific. You will need to measure as carefully as you possibly can and use your best judgement on what the best match is.