single hung window spring/cable balance

A quick learner from Florida says:
January 26, 2022

steel channel is 7/16" x 7/16" aprox metal length is 29" overall to ends of plastic guides is 29-3/4" marking on channel is 8-28-B spring length is 17" can you give me availability and price or if you need more info please contact me. Edward. Thank you

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Casey from SWISCO responded:
January 27, 2022

Hello,

Take a look and compare the S800-29 with a 3/8" wide metal channel and 28B strength option to your assembly. Thanks for posting! 
29" Series 800 Channel Balance
29" Series 800 Channel Balance
S800-29
$31.65
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