Channel Balance Replacement Part Help

A quick learner from Fullerton, CA says:
July 24, 2018

Trying to ID these Channel Balances for replacement by your part number.

Stamping reads : 1590 EH 20 1590 HF 20

vVertical type in between unclear, reads?? 381? 861?

Window Sash Weight as measured: 18.2 lbs

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Tom from SWISCO responded:
July 31, 2018

Thanks for posting. This looks like our S385-16. Your stamp uses an outdated rating system, so you'll need to weigh your sash to confirm which option will work for you.
16" Series 385 Channel Balance
16" Series 385 Channel Balance
S385-16
$9.34
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