Arrow Balance ID

A landlord from N. Carolina says:

I have purchased these parts from you folks in the past and hope maybe you still have some inventory. This is for a small over the sink window and looks like its 17.5" long. Only need (2)

If not what can I use as a substitute?

Correction: I believe the part is an S860 black cap and 1-1/4" shoe Arrow balance

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Bob from SWISCO responded:

These old arrow balances aren't made anymore, but you can replace this particular one with our Series 775 Channel Balance. Measure the length of the rod, not including the wedge shoe, to confirm the length you need. You will need the exact weight of the window sash to know what stamp option to select, as well as the size of your wedge shoe. Let me know if you have any other questions.

A landlord from N. Carolina says:
The sash weight is 9.25 pounds
The rod length is 15-5/16" (see picture)
The show size is 1-1/4" x 1/2" (see pictures)

Will I have to modify the window channel to fit the new hardware in and if so how?

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Bob from SWISCO responded:

Thanks for getting back to me. Based on the information you've provided, I think the S775-16 , with a stamp option of 16B and 1-1/4" Wedge Shoe, should work for you. Let me know if you have any other questions.

A landlord from N. Carolina says:
Do I have to modify the track to fit the new balance in and if so how?
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Bob from SWISCO responded:

No. The Series 775 should be a 1 to 1 replacement with your old balance. No other modification needed. 

How to install a S775 balance
How to install a S775 balance
GUIDE
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