1/2" non-tilt channel balance

A quick learner from South Florida says:
October 9, 2021
First is length 18". Stamped 17 1 D I
Second is length 30" NO markings.
Both have same plastic ends.
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Bob from SWISCO responded:
October 15, 2021

Thanks for posting. For the 18" balance, you'll need balances stamped 1710 with the 19-042 Top and 15-005 Bottom attached. None of our stock balances use this configuration, but we can easily provide it for you via custom order. I am sending you an email with a purchase link for two(2) of these balances right now. 

For the 30" balances with the same configuration, please give us the exact weight of the window sash that uses these balances. We can then work out the stamp these balances should have (that designates their strength). I will then send you a quote for those as well. 
A quick learner from south Florida says:
November 16, 2021
Originals are all 1/2" Caldwell Manfu. non-tilt side load window balance
Per your previous email tops are 19-042. Bottoms are 15-005
I would like to order the following:

2 stamped 23-2 24" long
2 stamped 23-3 24" long
6 stamped 29-2 30" long
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Bob from SWISCO responded:
November 18, 2021

Thanks for posting again. I just sent you an email with three purchase links: one to order six of the balances stamped 2920; a pair of the balances stamped 2320 and a third for a pair of the balances stamped 2330. All of these balances will have the 15-005 Bottom and 19-042 Top fittings attached. Let me know if you have any questions prior to placing this order. Many thanks. 
Channel Balance Top, Old Security
Channel Balance Top, Old Security
19-042
$0.97
Winged Channel Balance Shoe, 1" Depth
Winged Channel Balance Shoe, 1" Depth
15-005
$0.74
18" Series 380 Channel Balance
18" Series 380 Channel Balance
S380-18
$9.34
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