Tom from SWISCO responded:
June 1, 2017
Thank you for contacting us. In order for you to choose the proper weight option, you will need to get the exact weight of your window sash.
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Tom from SWISCO responded:
June 12, 2017
I would not go with the 1460, since that would be too strong. 1450 is the best choice for a 14.7 option.
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