Block and Tackle and Spring 27"

A handy person from Vancouver, WA says:
August 3, 2020
Hello. I was trying to find two of the springs in the photo. Not sure if they ever had wings or not as they could have ground off. I would need 2 of these '2640'. I also have 4 similar ones but they ate '20' lb ones (27") I also need one those spring clips that you set when you being the window up. Thx in advance for any info.
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Bob from SWISCO responded:
August 6, 2020

Looks like you have either an S351-27 or S390-27, depending on the bottom nylon shoe depth. You'll need a stamp option of 2640, which supports a window sash in the weight range of 19 through 26 lbs. If you need new take-out clips, see if our 16-002 matches up.
27" Series 351 Channel Balance
27" Series 351 Channel Balance
S351-27
$10.77
27" Series 390 Channel Balance
27" Series 390 Channel Balance
S390-27
$10.55
Take Out Clip
Take Out Clip
16-002
$0.41
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