Series 200 Spiral Balance

This is the SWISCO Series 200 Spiral Balance for non-tilt windows manufactured by Portalume.

The tube measures 9/16" in diameter but it is considered 5/8" in the trade. The tube houses an internal spiral rod with a 15-010 bottom shoe attached. Spiral window balances come fully lubricated and ready to be charged.
Series 200 Spiral Balance
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15" 16" 17" 18" 19"
20" 21" 22" 23" 24"
25" 26" 27" 28" 29"
30" 31" 32" 33"