Pella window Balance 26CBSI TV

Thanks for reaching out! Your window balances can likely be replaced with the S795-26. Although to ensure we are supplying you with the correct variation, I'll need to know how it installs at the top of the window. 

Does it use a hook or does it use a screw? If it uses a hook, please tell or show me the shape of the hole at the top of the track.

The shoe you have is the 15-194 1" T-Lock shoe, which is sold separately from our balances. They are fairly easy to swap out with the shoe that comes on the balance. Take a look at the tutorial for reference.