Window balance

Hey there!

It appears the fittings shown here lack wings. With that in mind, take a look at the S351-22 or S390-22 channel balances. The best option for your window comes down to the depth of the shoe as shown below. 

Your 2190 stamp is outdated but the 25 number may indicate the sash weight. If it does, you can select the 2150 stamp option. A pair of balances with this stamp will support a sash weighing 23 to 27 pounds. You could always weigh the window sash to confirm it falls within this range to be safe.

Let me know if you have any questions! 

Comparison of the S351 and S390 balance shoes.