Window coil balancers

A handy person from San Francisco says:
May 5, 2021
Hello I am a handyman and have a customer that disassembled the window and gave me all the parts. I am not sure how to convert the letters on the springs to the appropriate weight. the 2 top springs in the picture do not have a letter or number. The plastic piece in the middle on the left has the letter J on the back while the one on the right has a number 8.

Regarding the left bottom springs, the top spring(outer spring) has DL while the bottom(inside spring) has a C or a 0?

Regarding the right bottom springs, the top spring(outer spring) has DL while the bottom(inside spring) has a C or a 0?

I am looking for a full replacement of all parts pictured.
Thumbnail of the uploaded file named #2.jpg
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Casey from SWISCO responded:
May 6, 2021

Hello,

Take a look and compare the specifications of the parts that we've related for you to the original coil assembly. 

In cases like this where the coil stamps are unclear, we recommend weighing the window sash and dividing the weight by the number of coils on both sides of the window, which will give you the correct strength option. Thank you!
8 lb Series 152 Coil Balance
8 lb Series 152 Coil Balance
S152-8
$4.90
Pivot Bar, 3-1/16"
Pivot Bar, 3-1/16"
26-226
$2.55
Coil Bushing
Coil Bushing
15-143
$0.97
Coil Bushing Cap
Coil Bushing Cap
15-144
$0.70
Coil Support Barrel
Coil Support Barrel
15-145
$0.49
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