Channel balance

A quick learner from MA says:
October 10, 2017
I need a couple new block and tackle channel balances. Not up on my window lingo, but the windows tilt in to be removed and both the upper and lower windows move up and down. The balance is 28 inches long and is stamped 2730 BF. The pivot bar for the window also has a 2369 stamped on it.
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Casey from SWISCO responded:
October 11, 2017
Hey there! Thanks for choosing SWISCO.com. In order to determine which series channel balance you need, we need to see photos of the top and bottom fittings. Can you please send us those photos so we can get you an answer?
28" Series 385 Channel Balance
28" Series 385 Channel Balance
S385-28
$10.97
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