looking for window balance replacement

A home owner from Austin, TX says:
the metal part is 74cm (a little bit more than 29 inch) long, 1/2 inch wide and 5/8 inch deep. I need 5 pieces. Thanks!
Channel balance
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Tom from SWISCO responded:
Thank you for choosing SWISCO.com. It looks like you have our S351-29 channel balances. Please compare the measurements of the top and shoe to ours and see what you think.
A home owner from Austin, TX says:
Hi Tom,

I think you are correct. However, there are many holes in the balance shown in your picture. Will these holes affect the function of the balance? Thanks!

Yu
Profile picture of Tom
Tom from SWISCO responded:
Are you talking about the holes along the sides of the metal channel? If so, they will not affect the operation of the balance in any way.
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