Our tired old windows are starting to fail so it's time for new Channel Balances. The current balances are 26". Attached are pictures of the end guides as well as the number stamped on the balance, 2540 DD BSI. On the window we're working on, the block and tackle has several broken parts so we'll be buying the full replacement. We also need sash guides so I've included a picture of the ones we have. Thank you for your help.
Maryanna