Flex-hone® Tool Information: Color Code
Stem Marking	Type of Abrasive
No Color	Silicon Carbide (SC)
Black	Aluminum Oxide (AO)
Gold	Boron Carbide (BC)
Tan	Tungsten Carbide (WC)
Green	Levigated Alumina (LA)
Red	25% Zirconia / 75% Alumina (Z25)
White	40% Zirconia / 60% Alumina (Z49)
Order by actual cylinder I.D. All Flex-Hones are produced oversized.
End Marking	Grit Size
Brown	20
Purple	40
Grey	60
Orange	80
Silver (No Color)	120
Cardinal Red	180
Navy Blue	240
White	320
Yellow	400
Pink	600
Light Blue	800