Replacement Channel balances and attachments

A home owner from Washington, DC says:
July 5, 2020
I am looking to replace several channel balances and attachments in my apartment. As you can see in the attached pictures, the length of the channel balance is about 32", and the width is a little over .5". One of the balances is stamped 31-3 Caldwell JL, and the other is stamped 31-4 Caldwell CM. Do you all carry a suitable replacement? Also, if you do, will the balance come with the correct attachment? I watched your video on how to attach the end pieces, and I don't have the equipment to do that myself.

Thanks for your help, and please let me know if you need additional info or pics.
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Bob from SWISCO responded:
July 8, 2020

Hey there. This looks it might be a S380-32, which has a bottom nylon shoe depth of 1". The depth is the 'heel-to-toe' measurement, just below and perpendicular to where the metal channel ends. I advise checking that measurement just to be safe; sometimes it can be greater or smaller. You'd need stamp options of 3140 for the 31-4 stamped balances, and 3130 for the 31-3 stamped balances. And not to worry, all our balances come fully assembled with their fittings out of the box and ready to install. 
A home owner from Washington, DC says:
July 9, 2020
Yep, I think you're right on all counts. Thanks so much for your help - will place an order now.
32" Series 380 Channel Balance
32" Series 380 Channel Balance
S380-32
$11.52
32" Series 385 Channel Balance
32" Series 385 Channel Balance
S385-32
$11.52
Top Sash Guide Pair, Rollyson
Top Sash Guide Pair, Rollyson
18-124P
$3.92
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