Need "9R" Pivot bar

A home owner from Jacksonville says:
Pivot bar for YKK vinyl Windows. Patent number 6378169. I need a higher resistance because 6R does not hold the window in the open position. I need 9R. Do you have this in stock? Thank you.
User submitted a photo of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hello! This part is known as a window coil balance. Specifically, yours looks like our Series 140 balance, though I would like you to confirm the weight of the sash before we recommend the S140-9. It is possible for a balance to be too strong. Let me know!
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