1/2 inch wide channel balance, 29 inch Labeled "28 6 IR CALDWELL"

Question

One balance broken. Other side likely to need replacement. Another window balances same size probably should be replaced.

User submitted photos of a window balance.

Tom · Accepted Answer

A 29" balance with "wingless" attachments will be an S351-29 or S390-29 channel balance. Measure the depth of the bottom shoe to tell which one you need. Series 351 uses a 1" shoe, and Series 390 uses a 1-1/8" shoe. The 29" length makes sense for a balance with a "28 6" code, since there is usually a difference of 1 between the length and the first two digits of the code. If the code is correct, it will correspond to the similar "2860" code from SWISCO. That code holds 32 to 35 pound sashes, so verify that your sash falls within that range before making a purchase.

Example illustration of a cross section.