Vinyl Single Hung (only bottom tilts for cleaning). About 20 years old. Don't know brand. Need several balances. I believe they are block and tackle, (see pics), but they don't have the metal "channel" I see on all of them on your site.
Window will "pop" open about 6" when unlatched. I can open it farther, but it will fall back to the 6". To close, need to hold down with one hand and latch with the other.
Has a spring at bottom, 6" plastic piece and then the rope/string connects to a screw at the top. Can you help?
Thanks
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Does this pic show bottom of balance rod? Or is it all the way at the bottom of the spring?
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