Balance

Thanks for posting. Confirm that your metal channel, not including the nylon attachments, is 30" long. If so, see either our S380-30 or S385-30. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old balance to see what matches best. Your stamp code 29-9 is from an older rating system we no longer use. To know what stamp option you should select, you'll need to weigh your window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the product page. Let us know if you have any questions.