Window channel

Thanks for posting. This looks like either our S380-29 or S385-29. The only difference between these two Series is the 'depth' of the bottom nylon shoe. With the Series 380 the depth of this nylon shoe is 1", whereas with the Series 385 it is 1-3/32". Compare with your own and see what is best.

Once you know what balance to select, you must choose a stamp option. The stamp code on your metal channel is pretty faded and hard to read. I recommend that you weigh your window sash. You can then match that precise weight with one of the weight ranges listed alongside each stamp option on the product page.