Balancer

A quick learner from usa says:
April 20, 2017
The old balancer has "29B" and "USB" stamped on it. The aluminum is 30" long and 1/2" wide. Which SWISCO part do you recommend?
Channel balance
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Tom from SWISCO responded:
April 24, 2017
Thank you for contacting us. We believe you have a Pan Am window that may use our S377-30 channel balance with the 2920 weight option. Please take a look and let us know if you agree.
30" Series 377 Channel Balance
30" Series 377 Channel Balance
S377-30
$11.52
Top Sash Guide Pair, Pan Am
Top Sash Guide Pair, Pan Am
18-042
$1.97
Pan Am Take Out Clip
Pan Am Take Out Clip
16-023
$1.17
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