Single hung aluminum window. 34 9 rx cmc 11

A quick learner from Tampa says:
Just the sash measures 4 ft by 3 ft. I'm having trouble identifying the ends for ordering. The markings are worn so not sure if that is correct in the subject line.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
This look like our Series 385 channel balance, which comes with our 19-005 top and 15-004 bottom balance fittings. Please confirm that this is a match. I also recommend weighing your sash to determine the best option.
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