40" Series 390 Channel Balance

Product Code: S390-40

Product Description
This series 390 non tilt window channel balance has a 40" long metal channel. The channel's width measures 9/16" but is considered 1/2" in the trade. This balance comes fully assembled with a 15-001 shoe and a 19-002 top attached.
Stamp Option Sash Weight Range
3910 9 to 14 lbs
3920 14 to 19 lbs
3930 19 to 24 lbs
3940 24 to 30 lbs
3950 30 to 36 lbs
*This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Good Idea!
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
Helpful Tip!
The stamp option represents the strength of the channel balance. Locate the stamp on your channel balance. If your stamp does not match any of the stamp options available or you are unsure of which stamp option you should choose: ask our experts for help.
Customer Questions & Answers
Discussion # Of Replies Last Post Date
window balances 2540, 2740 & 3940This discussion includes image(s). 4 Sep 25, 2017
window balancers 8 May 1, 2017
Spring AssyThis discussion includes image(s). 3 Mar 31, 2016
Identifying Window Balance with Stamp 39 9 GW CMC 11This discussion includes image(s). 6 Mar 22, 2012
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