GAGE BLOCK SET H00448. SET SERIAL NO: H00448. STANDARD: ASME B89.1.9-2002. NIST TEST NO: 683/283426-13. 050 (G6165 +11) – 4.000(G5924 -1). CERTIFICATE OF CALIBRATION AND TRACEABILITY STILL IN. THE ORIGINAL PLASTIC COVER. INCLUSES ALL 81PCS INSIDE. OAD: 11 7/8″ X 7 3/8″ X 2 5/8. TM/458/BC C-6/(1)BC.