The metal casing measures 9/16" thick and 22" long (22 1/4" if orange/red piece included)
The spiral rod piece is 23 1/8" long.
This house will be listed for sale in the coming days and need the parts ASAP before clients walk the property and open this one window.
Paul from SWISCO responded:
September 19, 2017
Thanks for choosing SWISCO.com. You need our S600-22 red tip tilt balance and, to make the job easier, our charging tool, 75-006, to install. I've posted some guides to help you out.