Sash balance strength

A quick learner from Snohomish WA says:
July 18, 2014
Found S380 28" that looks like what I need. Not sure of the "strength" rating. My old one is stamped 2730G. Your choices are in the 26xx range of numbers. Mine is nominally a 3ft by 3ft single hung sash, vinyl, originally made by NW Aluminum in Washington state. I also need to top stop that secures into the sash panel channel where the lifter pushes up on the sash.
User submitted a photo of window balances.
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Paul from SWISCO responded:
July 21, 2014
Thanks for posting. There is a 2730 option available for our S380-28. Double check and see what you think.

As for the top sash guide, see our 18-008 and see how well its dimensions match up.
5/8" Top Sash Guide
5/8" Top Sash Guide
18-008
$0.95
27" Series 380 Channel Balance
27" Series 380 Channel Balance
S380-27
$10.55
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