Help identifying replacement channel balances

A home owner from SW Florida says:
May 27, 2016
Need help identifying replacement channel balances. See pictures. Current one is marked UB 28D. Metal part of balance is 29" long (not including plastic ends). Non-tilt window. 1/2" width. Window is large at 50" wide by 31" high.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
June 1, 2016
Thanks for posting. Please see our S380-29 channel balance. I believe this can work for you as a replacement. I'd also recommend our 2840 stamp option for sashes that weigh 23 through 28 pounds. You may want to weigh your sash to confirm that this is correct.
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
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