Replacement Balancer Cant Find

A quick learner from Oakland says:
I think I have found a close match but I am sure it is not exact.

I have a non tilt single hung Milguard window, the window pane and inside frame when removed measures 28" wide by 20 3/4" tall. Both balancers are completely missing. On a seperate window, the height measured 29 3/4" and the balancer for that one measured 27" not including the plastic pieces on the end. For my missing balancers, should I get one that is 2 3/4" shorter than 20 3/4"? I think I need your S350-21.

Also, the plastic piece on the bottom looks like 15-004 as it has wings. Is there a piece like 19-002, but with wings, like maybe 19-004?

Thank you!
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Tom from SWISCO responded:
Thanks for posting! There is, in fact, a winged version of the 19-002. Please see our 19-005. If you have the 19-005, then I do not think that the S350-21 is the replacement that you need. You should look through our Non-Tilt Channel Balance Section and see if you can find a Series that matches yours.

Without having your old channel balances on hand, it's really hard for me to say what will act as a replacement Your best bet is to see if there's an identical window in the house that may have the same balances.

As for the length of your channel, it's actually better to base it off the height of the glass, not the entire sash. What is the height of the glass for that window?
A quick learner from Oakland says:
Thanks for replying! Great service. The height of the glass is 18 1/4", it is probably more tho as I can only measure from aluminum edge to edge. So I imagine a balancer in between the sizes of 18 1/4" and 20 3/4". 19"?
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Tom from SWISCO responded:
Thanks for getting back to us. I agree, 19" is what I would choose, as well.

Now, once you've identified your Series, all you have left are the stamps. These determine how heavy a sash your balances can support while working in tandem. The weight ranges for a 19" non tilt channel balance are as follows:

1810: 5 through 8 pounds
1820: 8 through 12 pounds
1830: 12 through 14 pounds.
1840: 14 through 17 pounds.

Please keep in mind that the weight range information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A quick learner from Oakland says:
Great, thanks again. I have no idea what the weight is, I figure it is 12-14 but will double check and order. Thanks!
A quick learner from Oakland says:
I received the 19" balancers, and they worked! Installed them with no real issue. Thank you!
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