Minimal order for black silicon carbide can be a 25lb box. Wholesale packaging = 300lb drums but can even be packaged in fifty lb paper luggage. CBN and diamond wheels. The same standardization is applicable to CBN and diamond wheels. Wheel markings really are a combination of letters and numbers. https://hydraulic-busbar-cutter50370.yomoblog.com/34850648/silicon-carbide-in-glaze-can-be-fun-for-anyone