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I've asked around at local stores and they had no idea what it was.
A ceramic part in the valve broke so I can't just pick up a generic o-ring.
The stem has 16 teeth and 0.4" 0.365" diameter.
The valve is 5 inches long.
I found a brand on the sinks that are the same style. The company that made the faucet appears to be Harden. The style of the cartridge has similarities to others I'm seeing online for Harden.
The part appears to be "harden 185"
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