Replacement Window Channel - Non-Tilt

Thanks for posting. I am actually not certain if this is just one of our stock S380-29 or S385-29 Channel Balances. The top is our 19-005. The bottom might just be the shoe either of these balances use; it comes down the shoe's depth, or the 'heel-to-toe' measurement. Compare to the image below and see if your balance's shoe matches either. If so, for a stamp option you might need 2860, which will support a window sash in the weight range of 32 through 35 pounds. Measure the exact weight of your sash to confirm if you are uncertain. 

Comparison of the S380 and S385 balance shoes.

Hi Kevin. If the shoe was exactly 7/8" deep, then I'd suspect you'd need balances with the 15-029 Shoe attached. None of our stock items have this shoe, but we can supply it for you via custom order. If the shoe's depth is greater than that however, just less than 1", then I still think wear is the main culprit--I agree, 1/16" is a lot but it's not totally out of the question if the balances are, say, ten years old or more. Note that you could also sand down the 'heel' of the shoes to make them slightly less deep; but please be aware any modified items cannot be returned for refunds. 

You are correct that your stamp of 28F correlates with our 2860; that's exactly how I deduced it. All balances can be purchased right through our online store. You can go tot he S380-29 Shop Page, then click 2860 for the stamp. Then click "Add to Cart". Be sure to set the quantity you need. Let me know if you have further questions, or if you decide the custom option route with the 7/8" deep shoe is the way to go.