Window Channel Balance Replacement

Thanks for posting. All our balances come fully assembled with end attachments. This looks like either an S351-22 or S390-22, depending on the depth of the nylon shoe. See below. Measure your old balance's shoe to see what matches best.

Comparison of the S351 and S390 balance shoes.

You also have to choose a stamp option, which reflects the strength of the balance. Your old balance's stamp of 2190 is from a rating system we do not use. That '25' likely suggests the window sash weighs exactly 25 pounds. In that case you could choose a stamp option of 2150, which denotes a balance that can support a sash in the range of 23 through 27 pounds. Let me know if you have questions.