SWISCO - The Replacement Hardware Authority

21" Series 390 Channel Balance

Product Code: S390-21

Product Description
This series 390 channel balance also known as a block and tackle balance has a 21" long metal channel and is for a non tilt window. 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
2010 5 to 8 lbs
2020 8 to 12 lbs
2030 12 to 15 lbs
2040 15 to 23 lbs
2050 23 to 27 lbs
2060 27 to 30 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 & Comments
Discussion # Of Replies Last Post Date
Milgard channel balance.This discussion includes image(s). 2 Jul 7, 2016
Need 2 different window CHANNEL BALANCES, This discussion includes image(s). 2 Jun 21, 2016
2040 balance replacementThis discussion includes image(s). 2 May 17, 2016
Jordan 21" channel balanceThis discussion includes image(s). 2 May 17, 2016
21" channel balance 2020This discussion includes image(s). 2 Apr 5, 2016
Jordon Window 2030 BalanceThis discussion includes image(s). 4 Feb 29, 2016
Need window sash balanceThis discussion includes image(s). 4 Jan 28, 2016
Caldwell 1/2" sash balance marked 20 5 AQ CALDWELL. 21" long (metal part). This discussion includes image(s). 2 Sep 29, 2015
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