DU REZA TEST STANDARD 340 TO 360 HBW 2.5/187.5; ADDITIONAL DATA: THE BLOCK CALIBRATION LABORATORY MUST BE ACCREDITED ACCORDING TO ISO 17025 WITH A DECLARATION OF COMPLIANCE WITH ASTM E 10 AND ISO 6506-3 STANDARDS AND TRACEABILITY TO N.I.S.T; 340 TO 360 HBW 2.5/187.5