29" Swisco Series 800 window Channel Balance 28B

Description

Bought these to replace for my old windows. But I decided to replace all old windows with new windows. I removed the item packages but the item are in new unused condition. Swisco sells each for .55 plus tax.
Product Description
This is a Series 800 channel balance for non-tilt windows. It moderates the operation of your window sash using a specifically calibrated spring and pulley system that allows the window to stay open when raised.
This balance has a 29" long metal channel. When determining the length, do not include the attached fittings. Only measure the metal channel.
Comes fully assembled with the 19-007 top and 15-018 bottom fittings and will be ready to install out of the box.
The strength you need should be indicated as a stamp or imprint on your old metal channel. If you do not have a stamp, or cannot match it up to our options, weigh your sash on a scale and refer to the chart below.
The width of the metal channel measures 3/8".
Can work for either the left or right side of the window interchangeably.
Used in windows manufactured by both Binnings and Moss.
Stamp Option
Sash Weight Range
28A
4 to 8 lbs
28B
8 to 14 lbs
28C
14 to 20 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.