Need a Milgard window Channel balance

Thanks for posting! To confirm if this is the right replacement balance, I'll need to see a photo of an undamaged balance removed from the window. I am unable to identify them based on the sticker of the window, unfortunately.

There are many balances with this type of channel however, they all have different attachments. So, I'll need to see the attachments from your balance to determine the best possible replacement.

Are you able to provide a photo of your existing hardware?

Thanks for the photos. Your balances look like either the S380-37 with a 1" shoe or the S385-37 with a 1-3/32" shoe. To determine which series is needed for your window. Look over the dimensions from the diagram below to confirm the depth of your bottom shoe. 

Comparison of the S378, S380 and S385 balance shoes.

To determine the stamp needed for your balance, you'll have to obtain the exact weight of your window. Once you have the window weight, you'll be able to select the stamp needed for your balances, based on the weight ranges on the chart.