help replace these balances

A contractor from new jersey says:
June 23, 2014
the only markings on the coil are an EL on the top one and a D on the bottom one.
also the plastic cover for the top coil has an I
and the plastic cover for the bottom coil has a N
the housing that the coils are secured to has a #2 stamped into the plastic
User submitted photos of a coil window balance.
Profile picture of Paul
Paul from SWISCO responded:
June 24, 2014
Looks like it's just the pivot lock shoe that needs to be replaced. Check out our 15-175 and see if this is a match. If you also need the coil springs, you should also look at our S152-4 for the D spring and our S152-5 for the EL spring.
5 lb Series 152 Coil Balance
5 lb Series 152 Coil Balance
S152-5
$4.80
4 lb Series 152 Coil Balance
4 lb Series 152 Coil Balance
S152-4
$4.70
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
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Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
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