Window balance




Thanks for posting. If the metal channel, not including the nylon attachments at both ends, is 30" long, then you need either a S380-30 or S385-30 Channel Balance. The only difference between these two channel balances is the 'depth' of a bottom nylon shoe, or the 'heel-to-toe' measurement. See below. Measure your old balance's shoe to see what Series matches best.

You also have to choose a stamp option, which reflects the balance's strength. If your old balance has no visible stamp, weigh the widow sash these balances support. You can then match that exact weight with one of the weight ranges listed aongside each stamp option under the product description on either the S380-30 or S385-30 shop pages.