Window Channel Balance

Thanks for reaching out to us, Lidia. Based on what's shown in these photos, I would recommend our S380-26 or S385-26 depending on the depth of the balance's bottom shoe. Refer to the image below to see which one you'll need for this repair. 

I see that your stamp starts with 25 but I'm afraid I can't make out the number after that which is an important detail when it comes to choosing a spring strength option. I suggest checking the balance on the other side of the window to see if it has a clearer stamp. 

Let me know if you have any questions! 

Comparison of the S378, S380 and S385 balance shoes.

I'm afraid we don't have a shoe with your exact specifications but the two balances I recommended in my previous response are our best options. You can always double-check your measurement just to be safe, too. 

Since your stamp reads 25 5, you would want the 2550 spring strength option.