Thank you for your inquiry regarding this item from Prime-Line Products. There are actually a variety of specifications that must be matched correctly to ensure the right balances are ordered and installed for optimal performance of your window. Feel free to contact an associate in the window and door department (Millworks Dept.) of your local Home Depot for guidance on how order the correct channel balance, or you may also call in to the Prime-Line Products Customer Service department at (877) 649-9740 (toll free), or by email at email@example.com. You can also visit us at www.primeline.net where you can view and print our channel balance ordering instructions by following these simple steps:
1. Go to www.primeline.net
2. Enter model # FA 2740 in the search window and press enter.
3. Click on [Installation Instructions] at the bottom of the screen.
4. Review the 6 pages and familiarize yourself with the components and required specifications.
5. Use these tools and info to take to your local Home Depot, or to call in to Prime-Line Products where we will be happy to assist you with your channel balance replacement project.