Question about Stamp option and attachment

A quick learner from Nothern California says:
September 16, 2019
Hello,

My window weight was about 18.5-19 lbs, I was wondering since this weight was so close to the 2730 and 2740 stamp option, which one would be a better choice. I did notice it saying "27 4 Caldwell BM", which I assume would point to the 2740 option.

Additionally, I have attached some photos of the top and shoe attachment to verify if this is the correct product for me

Thank You, Neil
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Casey from SWISCO responded:
September 17, 2019

If your balances are stamped 2740 and have been working properly up until now, I'd recommend sticking with that spring strength. Please let us know if you have any other questions. Thank you!
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Casey from SWISCO responded:
September 17, 2019

I do in fact agree with your recommendation of the Series 350, Neil. Looks like you picked yourself a winner. 
A quick learner from Nothern California says:
September 17, 2019
Hello,

I have attached some photos of the top and shoe attachment and wanted to verify if the series 350 channel balance is the correct product for me.

Thank You, Neil
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28" Series 350 Channel Balance
28" Series 350 Channel Balance
S350-28
$10.97
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