balancer 2740

A quick learner from CA says:
August 27, 2017
Dear Swisco,

Could you kindly tell me which part I should order to replace this balancer 2740 FL? more details in the attached images.

Many thanks
Frank
User submitted photos of a window balance.
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Tom from SWISCO responded:
August 29, 2017
Judging by your plastic attachments and stamp, it looks like you need an S350-28 with a 2740 stamp option. You can verify the length by measuring the metal channel, which should measure 28". The stamp can be verified by measuring the window sash, which is the sliding glass pane. It should weigh between 19 and 26 pounds.
A quick learner from california says:
September 6, 2017
Dear Swisco,

Thank you for your response. I have another part to be identified and then I will order both together.

The part stamp is 3340, and the metal rod length is 34 inch.
channel balance
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Paul from SWISCO responded:
September 11, 2017
This shoe looks like it has a greater depth, perhaps 1-1/8". If so, I recommend our S390-34with a 3340 option. See what you think.
28" Series 350 Channel Balance
28" Series 350 Channel Balance
S350-28
$10.97
34" Series 390 Channel Balance
34" Series 390 Channel Balance
S390-34
$11.73
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