Need help identifying channel balance

A quick learner from 1/2" wide channel balances says:
Can you please from looking at the attached pic what parts I should order for my broken channel balance windows. The length of my channel is 27". From looking at the series 380 and 385 it looks like I have a 19-905 top with 15-002 bottom? Thanks, Vio
User submitted picture of channel balance 2640 stamp.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! The replacement window balance you need is our S395-27 with the 2640 option.
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