Spiral Balance identification question

A home owner from USA says:
Need help identifying window balances it is 31 inches long. The vinyl tube od is 7/16 and the metal spiral od is 3/8 the tip is a white to clear plastic bottom window tilts and bottom window weight is 20 lb may also need a tool to install them. thanks.
User submitted a photo of a window balance.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. Can you confirm the diameter of the plastic tube? It should be either 3/8" or 5/8".
A home owner from Georgetown Ky says:
Sorry for the late reply. The plastic tube is 5/8.
Profile picture of Paul
Paul from SWISCO responded:
Thank you! In that case, I recommend our S600-31 spiral balance. I would also recommend the Red Tip option, but weigh your sash just to make sure. Also keep in mind that our balance tubes are metal, not plastic. We find that plastic tubes get brittle and shatter too often.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)