spring balance for a wood sash window

A friend from in the bahamas nassau says:
please I need your help I am trying to fine sash window spring balance, the one that I have is a spring with a shoe at the bottom of the spring
User submitted photo of their window spring balance.
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Mike from SWISCO responded:
What type of window do you have? Do you happen to know the brand or manufacturer name of your window?
A professional from in the bahamas nassau says:
sorry but I don't know the name brand
please I need to know if this can work for my window
[ my window are the sash window push up and pull down [[[[[and it's wood
User submitted photos of their wood window and sash balance spring.
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Paul from SWISCO responded:
You may be able to use the Series 500 spiral balance with 17-007. See if your sashes are routed out to accept them.
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