I have several 38-year old Andersen windows where the sash strings are broken. I took one window apart and the boxes are stamped with the number:
D44 7P27 2X7
The boxes are 6-1/4" x 2-13/16" x 3/4"
What replacement part should I order?
Many thanks.
D44 7P27 2X7 Andersen Balance

Home Owner from Coatesville, PA
Aug 29, 2015 8:12 pm
2 Replies

Tom from SWISCO
Aug 31, 2015 9:48 am


Thanks for posting. See our 24-737. This can replace Andersen balance boxes stamped with "7P27."
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