37006978 – LABORATORY MATERIAL OR ACCESSORY; COMPONENT: STANDARD BLOCK OF BRINELL ZA HARDNESS 240 TO 260 HBW 2.5/187.; APPLICATION: EMCO HARDOMETER; FOR INDIRECT CA LIBRATION OF HARDNESS TESTING MACHINES ACCORDING TO AS TM E10-ISO 6506-3 STANDARDS. THE AGENCY THAT CARRIES OUT THE CERTIFICATION OF THE BLOCK MUST BE ACCREDITED ACCORDING TO THE REQUIREMENTS OF THE ISO 17025 STANDARD BY AN ACCREDITATION BODY RECOGNIZED BY THE ILAC (EXAMPLE NVLAP); MANUFACTURER 1: WILSON