Series 303 Spiral Balance

Series 303 Spiral Balance. This sash support system is primarily used in single hung aluminum windows manufactured by Keller. The tube is considered to be 5/8" in diameter, but it actually will measure 9/16. The tube houses an internal spiral rod with a 15-010 shoe attached. Spiral balances come fully lubricated and ready to be charged.
Series 303 Spiral Balance
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15" 19" 21" 23" 27"
33"
click here for lengths over 33"