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S351-28 28" Series 351 Channel Balance

Hello. I am going to replace the channel balances of 15 windows and need to make sure I order the correct ones. I think the ones I need to order are 390-28 but please confirm for me. The measurements are 28in x 1/2 in. My windows are non tilted and there are no wings on the guides. ... (cont.)

28" 2740Y Which one should I order? Thanks.

Metal channel only 28" Overall length with plastic ends 29" Channel 1/2" wide

The aluminum channel is 28" end to end excluding plastic pieces. There is a label on the aluminum channel 2730 BSI ET as shown in one of the pictures. The pictures are from an operational unit. There are two single hung non tilt windows in addition to the one the pictures were made from. Each window ... (cont.)

Stamp says 2740 BSI O.H.

Attached photos that I need identification on. The stamp says 2740 and it has a roller.

Hi, Can you help me identify this window part? I can't figure it out. It looks like 1/2 inch. 27-4 AA CMC 7. I need 4 of them.

Window installed 1996.

2740 P

Based on the measurements of the channel (28 in. length and 1/2 in wide) and the design and size of the attachments, I think I need the 28" SERIES 351 CHANNEL BALANCE (https://www.swisco.com/28-inch/pd/Series-351-Channel-Balances/S351-28). Just wanted to confirm before ordering 10 of these. ... (cont.)

need replacement

the width of the channel appears to be 1/2" and the length is 27" as far as I know it is a non-tilt window. The marking on the unit is 27C USB. Any help identifying it would be appreciated.

One channel balance is missing, the one remaining is broken. It is a 28" - 1/2" - has a 1 1/8" shoe with 2720 stamped on the back. I think the 351 series is a match, but somehow it looks like the spring attachment to channel is somewhat different. Perhaps because it is non functional. I would like ... (cont.)

Can't tell what to order by stamp on channel. It says 27 3. Window weighs 18 lbs.

I measured it at 28" long I have 8 windows

Hello, I am looking to replace these original balances in the windows. Length is 28" not including plastic. Had some trouble measuring the plastic part but it seemed to be a little longer than an inch. Stamp: 27 4 OS CALDWELL Thanks!

1/2 in width 28 in length Markings 27 2 BSI PD

I do not see any other mark other than the engraved 2730. This looks somewhat like the parts online for the 28" 2730. I will upload more photos on request

2730 28" x 1/2" BSI not sure if last letter is I, L, or 1 One balance has PC and the other OF

I believe I need the 28" series 351 2730, except my channel balance top guide have wings (that is if I am looking at it correctly). Thanks.