channel balance part identification

A home owner from Aptos, Ca says:
July 12, 2017
I would like to make sure I purchase the correct channel balance. The widow manufacturer is Kiro, in a Karsten mobile home installed in 2015. The channel balance is 27". There is no stamp but there is a printed code: 26-3 BK5 CMC 50. The part matches the picture for the 27" Series 385 Channel Balance. Does the 26-3 mean I should order the option 2630? The window measures approximately 281/2" by 34 1/4".

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Paul from SWISCO responded:
July 17, 2017
Yes, a stamp of 26-3 usually corresponds to our 2630 option. You can always weigh your sash to confirm.
27" Series 385 Channel Balance
27" Series 385 Channel Balance
S385-27
$10.55
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