Spiral Balance - 20-3/4" tube

A quick learner from Yorktown, VA says:
June 18, 2015
Thanks for your help! I need a spiral balance with a 20-3/4" tube. Since this is not a standard size, I'm looking for your advice. Also, there is no colored end -- and I have no bathroom scale for weighing my window. The window is double-paned (with internal separator to make it look like 6 lights), glass measuring 21-1/2" x 18-1/2" (with 1-1/2" vinyl trim surrounding all). Thank you!
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Paul from SWISCO responded:
June 18, 2015
The weight could be 12 pounds, based on that sash size, but the only way to know for a fact is to weigh the sash. 12 pounds is my best estimate but I cannot guarantee that this is what you have. As for the balance itself, can you tell me what Series you have?
A quick learner from Yorktown, VA says:
June 18, 2015
Series 600.
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Paul from SWISCO responded:
June 19, 2015
Thank you. In that case, I recommend our S600-21 spiral balance with a Red Tip.
21" Series 600 Spiral Tilt Window Balance
21" Series 600 Spiral Tilt Window Balance
S600-21
$8.58
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