Replacement channel balances

A home owner from Traverse City, MI says:
February 5, 2023

Hello,

I am looking to replace 2 sets of channel balances for two different windows. I've attached pictures of the end pieces and stamps. The balances are both 1/2" wide and 29" long, without the end pieces. The markings on set one are 2840K and the second set is 2820D (backward D) and both of them have a little B.S.I. stamp underneath. The end pieces are identical in length, width and height for both sets. Please let me know if you have any additional questions. Thank you very much.

Luke

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Jasmine from SWISCO responded:
February 6, 2023

Thanks for reaching out. It appears you have either our S350-29 or S390-29 Channel Balances. The stamp options are, of course, 2820 and 2840.

To determine which balance series you have, you'll need to confirm the measurement for the depth of your bottom shoe.

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
29" Series 351 Channel Balance
29" Series 351 Channel Balance
S351-29
$11.10
29" Series 390 Channel Balance
29" Series 390 Channel Balance
S390-29
$11.10
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