Part identification Days Mill apartments

Many thanks for your correspondence. For your 14" channel balances, you will need the S775-14 with 1-1/4" wide shoe and 14B stamp. For the Coil Balance system you show, use the 15-180 Balance Shoe with 15-181 support clip and 15-182 bushings. I am fairly sure the coil reads six pounds, so you would use S190-640. To be safe, please weigh the window sash and give me the exact weight so I can confirm this. Let us know if you have further questions.

That's lighter than I expected, but for an 11 pound sash you could use one 6 pound spring per side. That may even be what your setup is using now, though I was thrown off by the fact that you have a double spring retainer. If you only use one per side, you could change that to the 15-186 single spring retainer.

Either way, that would be our S190-640. Two of these working together offer 12 pounds of support. You may want to get a more precise weight of your sash to verify that this is sufficient.