Channel Balance Purchase

A home owner from USA says:
July 11, 2017
I need to purchase a replacement channel balance for a Milgard window. It's a 24" long 1/2" channel, and pictures of the ends are attached. Stamped on the channel is "23 9 KR Caldwell". I have determined that I need the S380-24. According to my scale, the sash weight is 28 lbs. Is that close enough, or do I need to special order? Stamped on the original channel is "23". Does that mean that it's been under-sized from the beginning?

Please tell me what replacement I need to order from you. Thank you.

Dennis R
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
July 17, 2017
Thanks for contacting us, Dennis. Based on your sash weight, I think our 2360 option would be best for you. This was not available before, but we just added it online for you to select. Let me know if you have any questions!
24" Series 380 Channel Balance
24" Series 380 Channel Balance
S380-24
$10.55
24" Series 385 Channel Balance
24" Series 385 Channel Balance
S385-24
$10.55
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