Sash balance

A quick learner from Palo Alto, CA says:
August 5, 2023
15 inch track (not counting plastic end caps)
marked: 14 4 KN Caldwell
rounded plastic end cap at end with pulley
pointed plastic end cap at end with spring

Missing the small ropes and hook that attached to window sill
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Emily from SWISCO responded:
August 7, 2023

Thanks for reaching out to us! It looks like you want either the Series 380 or Series 385. The best replacement will depend on the depth of the bottom fitting as shown in the photo below. I also recommend the 1440 strength option based on your stamp. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
A quick learner from Palo Alto, CA says:
August 7, 2023
Thanks Emily ;-). I think it is the 1 3/32 ( so tiny ) version, i.e. 385 -- so I will order. My window seems to only have one, not two (on the other side) -- is that normal?
thanks,

George
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Emily from SWISCO responded:
August 8, 2023

No problem! I'm happy to help. That's not normal, no. A window should have a balance on both sides. A pair of balances with the 1440 stamp can support a window sash weighing 12 to 13 pounds so you may want to weigh yours on a scale to confirm. 
15" Series 380 Channel Balance
15" Series 380 Channel Balance
S380-15
$9.34
15" Series 385 Channel Balance
15" Series 385 Channel Balance
S385-15
$9.34
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