Continental rods from Kirsch are used almost exclusively for valance or top treatments. If your valance has a wide rod pocket (the area where you slide the valance onto the rod), then you're going to need a Continental Rod from Kirsch.
Continental I rods are built for rod pockets around 5 1/2" to 6" and Continental II rods are built for rod pockets around 2 1/2" to 3".
Make sure to check to pocket depth before you order your Continental Rod.