A quick learner from southern California says:
hello, vynil window. single hung.
these little guys sit in a plastic holder inside the vent portion of the window.
holds 4 bands. completely destroyed when removed. no identification markings or numbers.
have located springs but not the holders or how in the heck to reset them to operate the windows.


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Bob from SWISCO responded:

Thanks for posting. These look like our Series 145 Coil Balances. If you have four coil springs on each side of the sash, then they can be housed in our 15-103 Quad Side Load Carrier. Look at our 15-108 Sash Cam, 15-222 Sash Guide Base, and 15-223 Sash Guide Cover as well in case if you need these items also. To know spring weights you need, look at your old coil springs for stamped numbers. If your coil springs have no stamped numbers, weigh your window sash. Give us that exact weight, and we'll figure out what you need. 

15-103 : Quad Side Load Carrier
Quad Side Load Carrier
15-108 : Sash Cam
Sash Cam
15-222 : Sash Guide Base
Sash Guide Base
15-223 : Sash Guide Cover
Sash Guide Cover
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