Replacement channel weight

Thanks for your patience during our busy season. This looks like either an S380-26 or S385-26. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. Your stamp code of 25-9 is from an older rating system we no longer use. To know what stamp option to select, we recommend you weigh your window sash. You can then match that exact weight with one of the stamp options listed on the product page. Let me know if you have any questions.