– 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 CARRYING OUT THE CERTIFICATION OF THE BLOCK MUST BE ACCREDITED ACCORDING TO THE REQUIREMENTS OF THE ISO 17025 STANDARD BY AN ACCREDITATION BODY RECOGNIZED BY ILAC (EXAMPLE NVLAP); MANUFACTURER 1: WILSON