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S385-28 28" Series 385 Channel Balance

This is from a mid 1990's vintage aluminum double hung non-tilt window manufactured in San Diego, CA. There is a stamped number "2740"; metal part is 28" and 9/16" wide. Can you identify? Need 4 ASAP. Thank you in advance! Hope Hurricane Irene not too disruptive! Michael K.

I have a 28" wide window with channel stamp 33 2 jo caldwell. Can you cross reference this to standard designs you carry or recommend other options for ordering

Please advise on a replacement set of balances. The original part is marked with 27 4 BQ CALDWELL. What would be a replacement part? and should I replace both sides at the same time? Thanks in advance!

Is the window missing the balances the same type and brand of your other window? Attach some photos of your current channel balance system to your reply post.

I ordered some series 351 channel balances based on your recommendation that many customers find that they work for GapCo windows. They DO work, but they are not exactly correct - the window has some left-right play as it goes up and down. I was reluctant to actual take out the old balances until I ... (cont.)

The channel balances in my windows appear to have a 15-004 shoe and a 19-005 top. (1/2" wide balance, non-tilt aluminum window) Do you have anything compatable? I need... one pair for a 16" 1520 BSI one pair for a 22" 2130 BSI two pair for a 28" 2730 BSI

I am looking to replace a dozen window balances. I do not seem to be able to find a match on your web page. It appears to me that they have a 15-005 on one end and possibly a 19-005 on the other.Stamp: 2720 BSI