weather seal on the bottom of a Simonton single hung widow and with window part number

Thanks for reaching out to us. I'm afraid I cannot identify what kind of weatherstripping you have based on these photos. In order to help, I will need you to remove a small, undamaged sample and show me a clear shot of the end profile.

I know that your old seal is falling apart and getting an undamaged sample is easier said than done, but it's the only way we can help. The video below will clarify exactly what we need.

Thanks! This first photo is perfect.

Since the "T" insert is .189", my recommendation would be the 58-182. Look it over and see what you think!

Profile of 58-182