Need window channels

Your balance closely resembles both our S380-30 and S385-30. The only difference between these two balance is the depth measurement of the bottom balance shoe. The depth of the bottom shoe for the Series 380 is 1" and for the Series 385 is 1-3/32". Measure the depth of your bottom shoe, like in the diagram below, to determine which balance is the best match. Whichever one chosen will go with the 2920 option.

Alternate view of 15-004

If these balances have been in the window for quite some time there is a chance the bottom shoe could have worn down over time. If you are able to retrieve another balance that does not have as much wear and tear on it, measure it and get back to us with the measurement you're getting. 

I agree with your first suggestion. If our shoes are a little too deep then you can always shave them down a little to fit. I do it all the time and find that it works well. 

We do sell the 15-029 shoe, which is 7/8" deep. We can provide an S380-30 balance with the bottom shoe swapped out for this, if you'd like, but it would have to be a custom order. If you were interested, let me know how many you need and I can email you an order link and price quote.

Ok great. You may place an order for those items directly on our website, or you may contact the customer service department and place an order over the phone.