Enough information to order S 140 units.

Thanks for reaching out to us. You may be able to use our Series 140 in your window, but there are a few things to consider before you try it. Namely, you have to make sure that the old balance assembly has the same width and thickness (1-1/4" x 9/16"). Otherwise the Series 140 won't fit properly in the track.

The second thing you have to consider is that the Series 140 has a different style metal cam than most other pivot shoe styles, so your old pivot bars may also not fit.

We generally recommend sticking with what you have already. Looking at the parts you picked out, the 15-150D cover and S160-6 spring are perfectly compatible. Is there any reason you don't think these will work for your window? You did say that you don't see the covers offered, but I'm a little confused by that statement. The 15-150D itself is the cover. Can you clarify?

You're very welcome! Please feel free to reach out if you had any other questions. We're here to help at your convenience. We can pick this conversation back up right where we left off whenever you wish.