Window balance for 2 windows

Those are pretty heavy sashes. We may be able to supply balances that can support that kind of weight as custom orders, but I need to know what you have, first. What Series were you looking to purchase, specifically? 

Thank you. The 30" balance does not have to be custom made. If you were to look at the list of options on the S380-30 store page, you can see that the 2975 carries 42 through 45 pounds. This can be purchased normally.

The 31" balance will have to be custom made. I'll email you a purchase link right now for 2, which will allow you to add it to your cart. That way you can checkout with everything at once.

If all of the balances broke, then I highly doubt they were all defective. The odds of that happening are slim. Odds are they were just the wrong part for the job. I can tell you right off the bat that the stamp doesn't match either of the two numbers you gave me. While I don't know for a fact, logic dictates that this is the reason they didn't work. I wonder why the manufacturer didn't just give you the same stamp as before.

You should carefully compare those new balances to the old ones to confirm that they're 100% identical in every other way. There could be other differences, but I can't say what they'd be.

Sure, I'll do that right now. Let me know if you need anything else.