window Balance

A home owner from New Mexico says:
We have an 18-inch long, 3/8-inch dia., red tip, block and tackel end older window balance and we need 4 replacements. We have ordered the wrong ones and need what will work, thank you for your help, we have company coming soon.
Sincerely,
Jim
Thumbnail of the uploaded file named Wright's Window Spring 1.jpeg
Thumbnail of the uploaded file named Wright's Window Spring 2.jpeg
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Emily from SWISCO responded:

Hi, Jim.

This looks like a balance for a non-tilt window such as our 3/8" diameter S400-18 with the red tip option. Review our specifications and see what you think.

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