Particle size distribution 1-250 microns. Typical distribution:96% < 22 microns90% < 16 microns64 % < 10 microns16% < 5 micronsMean size is 8.4 microns.SHAPE: Predominantly spherical PACKAGING: 4 & 20 Kg. Chemical composition and particle size distribution can be adjusted to suit customers' requirements.The specifications listed are subject to the benefits and scrutiny of Osprey's accreditation to ISO 9001. If the product delivered does not substantially meet the specification, Osprey will replace it. Osprey's liability is limited to the cost of replacement. Information provided to MatWeb by Osprey Metals.