channel balance non tilt windows

A quick learner from Imperial mo says:
February 28, 2020
need to get 4 new ones the only markings on the balances is - B.S.I. 2930- they are 1/2"

Thanks
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Casey from SWISCO responded:
March 2, 2020

Please have a look at our S351-30 channel balance. This comes complete with a 19-002 balance top and 15-002 bottom balance shoe. You will need to carefully compare your fittings with ours to confirm this will work. If so, then you can go with the 2930 option that supports a sash weight of 16-23 pounds.
A quick learner from Imperial mo says:
March 2, 2020
Thanks very much for your prompt response and help so i could purchase the correct channel balances
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Casey from SWISCO responded:
March 3, 2020

You're very welcome. Glad we could help. 
30" Series 351 Channel Balance
30" Series 351 Channel Balance
S351-30
$11.52
Channel Balance Top Guide
Channel Balance Top Guide
19-002
$0.74
Channel Balance Shoe, 1" Depth
Channel Balance Shoe, 1" Depth
15-002
$0.74
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