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> New spi 12-499-0 cylinder square 12" high x 4" diameter
New spi 12-499-0 cylinder square 12" high x 4" diameter
SPI 12-499-0 Cylinder Square 12" High x 4" Diameter New
Commonly used on a surface plate as a 90 degree reference
Hardened with ends lapped to 90 degrees
Can be used for checking squares, height gages and other instruments
This is new but has some surface discoloration
I guess it should be called corrosion but can't really be felt
This should clean up fine and not affect performance at all
