Window channel
Hello, thanks for posting! It looks like you could have either our S351-33 or S390-33 with the 3230 stamp option. The difference between the Series 351 and the Series 390 lies in the depth of the shoe. Take a look at the picture below for more detail. Once you have determined this dimension you should be able to select the appropriate balance.
I apologize for this inconvenience. The balances that you are inquiring about have been ordered but, due to the state of affairs, things have been moving a bit slower than we'd normally expect and our information is limited. You can sign up for our auto-notification service on the product page and you will receive an e-mail notification as soon as we have the part back in stock.