Sash balances

A handy person from Henrietta, NY says:
Need to replace the following Anderson Narrowline window sash balances:
E219 #27 ( manuf. date 5-85)
BP812 #27 ( manuf. date 3-85)
I need to know what the conversion is to new part numbers.
Thanks.
Steve
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Tom from SWISCO responded:
Hey, Steve. I believe the key stamps here are "9#27" and "12#27". I recommend our 24-939 and 24-1231, respectively.
A handy person from Henrietta, NY says:
Thank you for the info.
Steve
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