Alliance counterballances

Hi there! Thanks for reaching out to us. We're happy to help with this. We sell a variety of coil supports like this so we'll need more information to help narrow down your options. Can you show us a photo of the pivot shoe, preferably removed from the window track? 

Thanks for the additional photo! Our 15-191 looks like a match. This is used with the Series 160 coil springs which are sold separately. We also have the 15-150D double support if you have a double spring set up.

I'll be here if you have any questions!