Window balance

A contractor from MD says:
May 28, 2021
I believe I need a 751 balance. These are for Malta windows. I see the balance knife lock shoe 15-014 that looks like the shoe in the broken windows I have. I see a shoe attached to the 751 balance but it looks like it is 90 degrees off? There is a "20" stamped on the balances I need to replace.
Looking for the cam pivot also possibly 17-093 ?
Pics attached.
Thanks
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Bob from SWISCO responded:
June 2, 2021

Please measure the metal channel to confirm the actual balance length; it may be 21" rather than 20". Weigh the exact weight of the window sash to know what stamp option to select. Make sure the shoe actually resembles the 15-014, rather than something like the 15-197. Finally, for the pivot bar, see our 26-150. 
20" Series 751 Channel Balance
20" Series 751 Channel Balance
S751-20
$10.45
Cam Pivot Pair
Cam Pivot Pair
26-150
$2.87
21" Series 751 Channel Balance
21" Series 751 Channel Balance
S751-21
$10.56
Balance knife lock Shoe
Balance knife lock Shoe
15-014
$1.09
Black Locking Terminal, Great Lakes
Black Locking Terminal, Great Lakes
15-197
$2.04
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