window sashing balance replacement

This appears to be a 21" Series 751 balance, stamped 20HD. However, your balance might use the 15-197 Knife Shoe, rather than the kind of shoe that comes attached to this balance by default (our 15-014). Please remove and compare to confirm. If your balances do use the 15-197, we can provide this, but the balances have to be custom built due to this unique design. We can do this for you no problem; I just need to know how many balances you need. From there I can draft a quote for you.