Rex-cut Standard Marking System:
Grain	Grit				Hardness	Bond Type
A: Aluminum Oxide C: Silicon Carbide	Coarse 16 24 36	Medium 54 80	Fine 120 180	Very Fine 320	G - Soft J - Med M - Hard N - Very Hard	FX - Latex Bond (white) TX - Resin Bond (brown)
The two most common product types are:
	White "GFX" for finishing Stainless Steel Brown "MTX" which is excellent on Aluminum.
The FX Bond is a unique flexible bond that blends and finishes in one single operation. The TX Bond is a strong resin bond that combines resiliency and cutting ability with long life.
The G hardness is a soft bond for light deburring, blending and finishing. The J hardness is a medium bond for light deburring and longer life. The M hardness is a hard bond for light to medium stock removal. The N hardness is a very hard bond for medium stock removal and longer life.