Spiral tilt balance

Quick Learner from Chicago suburbs
22 inches long, blue tip both sash tilt in at the top. I need 2 of these. thank you. 
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Bob
Bob from SWISCO
SWISCO
Expert

Hey there. Please confirm the diameter of the metal tube. If it is 3/8", see the Series 900 Spiral Balance. If it's 5/8", see the Series 600. The video below explains.

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