replacement bottom window coils

A contractor from princeton nj says:
i have a bottom sash window that needs new coils both sides

See photo
this photo is of the top sash coils which is working

Bottom part of the coil has a 5 stamped on it
Top part of the coil has a 7 stamped on it

both in the same window channel
User submitted a photo of a coil balance.
Profile picture of Tom
Tom from SWISCO responded:
Hello! Thank you for contacting us. Please see the following parts: 15-087 pivot shoe, 15-086 spring cover, and finally our S180-5 and S180-7 coil springs. Please review these parts and see how well they match.
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