Sash Windows photos (2) of your websiite

It looks like the one you're referring to is our 18-172. Take a look and see if this is correct. It appears you may have typed the incorrect number. 

These guides can work with a variety of balances. We will need to see photos of your original balance out of the window. We will need to know its metal length, channel width, as well as, any stampings or markings that may appear on the channel. From there, we will do our best to help you.