Need to replace lower window guide/spring

Home Owner from 06379
Sticker says NAMI:

CODE: LWC
SPEC: NFRC
SERIES: VINYLOCK DH
MST 4060

Window is a double hung standard window. The lower window sash itself is OK - but the part that the tab sits in inside the casing and attached to the spring (twisted metal) is broken. Can't seem to find what that part number is for that.
2 Replies
Tom
Tom from SWISCO
SWISCO
Expert
The information you provided relates to the window's energy efficiency certification. It doesn't tell us anything about the balance, unfortunately. Take a look at our selection. Do you see the type of balance you need?
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