Channel Balances Needed

A quick learner from usa says:
March 9, 2022
I am in need of these balances, they resemble the 377 and the 371 but not quite due to the top portion of the balance.
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Bob from SWISCO responded:
March 9, 2022

This looks like the Series 377 to me. The top fitting looks close to the 19-018, which is what's used with this particular balance Series. The only other possibility would be the 19-041, but based on these pictures I think the 19-018 is closer. Please review the specifications and let me know if you think anything differs. 
Channel Balance Top, Pan Am
Channel Balance Top, Pan Am
19-018
$0.92
Channel Balance Top, New Security
Channel Balance Top, New Security
19-041
$1.30
Winged Channel Balance Shoe, 1" Depth
Winged Channel Balance Shoe, 1" Depth
15-005
$0.74
30" Series 377 Channel Balance
30" Series 377 Channel Balance
S377-30
$11.52
12" Series 377 Channel Balance
12" Series 377 Channel Balance
S377-12
$9.34
24" Series 377 Channel Balance
24" Series 377 Channel Balance
S377-24
$10.77
18" Series 377 Channel Balance
18" Series 377 Channel Balance
S377-18
$9.34
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