"Dan Krueger" wrote in message
hlink.net...
99 is a wire gauge.

Wire gauges are made in this way, but the photo is not one of a wire gauge.
The measurement listed on one side is "lights per inch", and on the other is
"ounces per square foot".

The latter seems to be a gauge to determine the weight of some sheet
material (sheet metal perhaps?), since the weight goes up along with the
thickness. But the side with the "lights per inch" measurement goes *down*
as thickness increases, and I don't have a clue what that could be used for.

Jack