Your part equivalent to CR Laurence

A home owner from Colorado says:
August 23, 2016
I need a 27" Channel Sash Balance with parts that are the same as CR Laurence #FA2640 and FS291B kit. I've found your 15-004 boot that has the same dimensions but has wings and I don't know enough to know if the wings would cause an issue. Not sure that I need the heavy duty one I don't think our windows are that heavy, that's just what we ordered last. These sashes seem to constantly break.
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Tom from SWISCO responded:
August 24, 2016
Wings help stabilize the balance in the jamb track, should the jamb track be too wide. If your old shoe does not have wings, how about our 15-001, instead? If you want, you can take pictures of your hardware and we can work from there.
A quick learner says:
August 24, 2016
I took one to a local window company and they ordered without wings but we just pulled one of the originals and they do have the wings. Thank you, perhaps that's why we've had non-stop trouble with them. I'll order with wings.
Channel Balance Shoe, 1-1/8" Depth
Channel Balance Shoe, 1-1/8" Depth
15-001
$0.74
Winged Channel Balance Shoe, 1-3/32" Depth
Winged Channel Balance Shoe, 1-3/32" Depth
15-004
$0.74
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How to Replace a Channel Balance Attachment
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