correct channel balance length

I don't have a camera to send pictures, but I've measured and re-measured balances, attachments, and windows. I'm fairly confident that I can go with the Non-Tilt Series 351 (1/2 wide) as the top attachment 19-002, and the shoe attachment 15-002 (1x1) match exactly with the measurements on your site.

-The channel balances recently replaced by a window repair co. measure 29 inches (metal only) stamp is 2830.

-The channel balances I'm planning to replace now measure 30 inches (metal only) with a 2930 stamp.

Question:

Would you suggest I go with 28 inch (your 351-28 option 2740), or 29 inch (your 351-29 option 2830) if the glass in all my windows is 27 1/8 inches tall (frame 30-1/2"), and the sash weighs 20 to 22 lbs?

Thanks,

Thanks for the info. I know nothing about windows, but this couldn't be easier. So, I'll ask another question before I order.

I have top sash guides that look like your 18-061. The exception is mine has a 3/16 inch hole placement (versus the 1/4 inch). All other measurements are the same.

Do you have one with the 3/16 hole placement? If not, maybe I'll order a couple of the 18-009 and see if they will work.

Rachel

Nope, I can't get 1/4" winthout measuring from the top of the guide (your image shows it measured from the bottom.

I placed my order this morning. I'm going to try to salvage my sash guides. I included one only of this guide just to check it out.

Thanks for all your help,