Hallmark window channel balances, 27 4 BSI

Question

All the windows in my house are Hallmark brand. Need the part that supports the window when opened. The plastic end pieces are broken. Mental rid is about 38 inches. Any assistance is appreciated.The number on rod is 27 4 Bsl. The letters couldnt be seem with the naked eye, the best I can tell. The window measures 35 width by 59 length. All of windows are Hallmark brand. I seem to have the problem with the rods not staying in place causing window to drop down.

If this is the right part, may needs a few. Is there any thing written on how to maintain this hardware to prevent from breaking?

Tom · Accepted Answer

It looks like either an S380-28 or an S385-28, but I can't tell from a distance. You'll need to measure the bottom shoe of the balance, the plastic piece at the bottom, and compare it to the diagram below. If your shoe measures 1", choose the S380-28. If it measures closer to 1-3/32", go with the S385-28. Be sure of your measurements before ordering.

Comparison of the S378, S380 and S385 balance shoes.