Channel Balance Part for Alenco Window

A home owner from Van Alstyne< Texas says:
Please tell me your part number for the channel balance parts to repair an Alenco single sash window. The channel is 28 inches long and 1/2 inch wide. 27C is stamped on the channel. Also BSL is stamped on the channel. The window was originally installed in 1985
User submitted photos of a window balance.
User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. I would recommend either our S351-28 or S390-28, depending on the size of the bottom shoe. You will need to measure yours and refer to our dimensions in order to confirm a match. As for the top sash guide, start by looking at our 18-009. I would also recommend comparing your dimensions to ours.
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