Looking for replacement channel balances

A handy person from Chicago area says:
August 31, 2020
It's a channel balance, tabs are winged at both ends and the base looks small compared to others I've seen. Marking I can read is 2730D (I have another from a similar window without the D..). 28" lon
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Bob from SWISCO responded:
September 3, 2020

See either our S380-28 or S385-28, depending on the bottom nylon shoe depth. If your shoe's depth appears to differ from both of these balances, let me know. You'll need a stamp option of 2730. 
28" Series 380 Channel Balance
28" Series 380 Channel Balance
S380-28
$10.97
28" Series 385 Channel Balance
28" Series 385 Channel Balance
S385-28
$10.97
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