channel balance replacement

A quick learner from memphis tn says:
i need this channel balance: total length is 30 1/16 inch.the metal frame measures 9/16 x 1/2 inch.please view picture.
User submitted photo of their channel balance.
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Mike from SWISCO responded:
This appears to be our S390-31 Channel Balance. However, we will need the number printed on the balance in order to determine the correct balance Series.

Can you please give us any letters and/or numbers printed on the balance?
A quick learner from memphis tn 38134 says:
Thanks for the reply!!! Sorry no numbers on the part, i have looked closely.I think the part S390-31 looks like the one. I wilL call your company and order some parts,if you think that would be the safe thing to do.IF NOT, PLEASE ADVISE!! thank you, Tom F
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Mike from SWISCO responded:
Well, we need to figure out what stamp number you'll need. Can you remove the window sash and place it on scale and give us the sash weight in lbs?
A quick learner from bartlett tn 38134 says:
Thank you for your help!! I did find a stamped number on the channel balance. Number on channel balance is (28 3 L 1). Weight of the sash is 16.5 pounds.Thanks again!! Tom
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Mike from SWISCO responded:
Thank you for getting back to us.

Can you confirm the length of the channel portion of the balance only?
A home owner from BARTLETT TN 38134 says:
THANK YOU FOR ALL YOUR HELP. THE METAL PORTION OF THE BALANCE IS 29.0 INCHES IN LENGTH. THANK YOU TOM F
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Mike from SWISCO responded:
It appears you'll need the S390-29 Channel Balance with the 2830 stamp option.
A home owner from Bartlett Tn 38134 says:
Thank you Mike i will order parts now!! Tom Ferguson
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