>>>Metallic Bond (Code J): With normal-seen Bronze bonded (Code Q) to manufacture Diamond & CBN wheels. The characteristics of this kind of wheels is the excellent sharpness and high-intensity with relatively toughness. While this wheel have the low self-amending capability. >>> Attention One: The heat-resistance wheel could be manufactured of Black, Brown-red, green, white etc. according to your requirements. And the wheel would be regulated with formula according to the different grinded. Attention Two: The Resinoid wheels could be divided into Red, Green and Black. Attention Three: Non-ordinary wheels could be manufacture according to your specific requirements. Attention Four: We provide the technical support for your.