Hello I need to order a replacement window sash retractable unit..part # is 11600-17 need two of them for a double hung window. It measures about 26 inches wide and 32 high? D87 7127 1033 is the other numbers I see on the back.
Tom from SWISCO responded:
October 7, 2016
Based on your stamp of "7#27" I would recommend our 24-737 Andersen sash balance.