My ceramic sink was at least ten or twelve years old. The diameter of the required mounting holes was not noted. I had to enlarge the mounting hole diameter with a die grinder with a diamond bit. At least 3 previous faucets have been installed in the sink with no problems. Some folks might not want to mess with enlarging a sink hole. I didn't put a caliper on it but think the required hole was about 1.125". Possibly newer sinks come with larger holes than the older sinks. I would buy it again.
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