Good morning. I need to replace these items on our windows. Home built in 1999. The length of this is 32" which I measured per your website's instructions. The tip of the support is white (best I can tell) and the diameter (plastic sheath) is shown above. I believe it is 3/8"
I believe I would need the screws and the brackets that the spring supports fit into, in addition to the charging wrench.
Thanks for your assistance!
T Scott