CRMs are available as turnings, powders and solid discs, These CRMs have been prepared following ISO Guide 34, 35 and other allied standards, Each unit of CRM is accompanied with a composition certificate with uncertainty, No environmental issues are involved in the present set of CRMs, Major Raw Plant Equipment and Machinery Required are Crusher, Grinder, Lathe, Analytical equipment such as DRS, AAS, ICP-OES etc.