... same kind of products.Physical and chemical properties:itemtargetitemtargetAppearanceblack cylinders or extrudatesNickel , wt%min 42%Particle size ,mmDia ... 5*5(cylinders),2.0*2-15(extrudates) Chemical compostionnickel- aluminaSurface area ... , m2/g80-130Crushing strength, N/cm130min(cylinders),min100(extrudates) Bulk density, kg/l0.90-1.30 ...