Series 900 Spiral Balance

A home owner from USA says:

You were referred to me by a salesman at Home Depot. I need two series
900 spiral balance parts and two pivot lock shoes. The spiral balances
in my window measure 28-3/4". Should I order the 28" or the 29"?

Thank you for your help.

Profile picture of Paul
Paul from SWISCO responded:
Hello, Augusta. I would recommend rounding up to the 29" long balance.
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