SPI 81 Piece, 0.05 to 4″, Grade 0, Steel Gage Block Set, Rectangular, +10 – 5µ (3″), +12 – 6µ (4″), +4 – 2µ (0.050-1″), +8 – 4µ (2) Tolerance, NIST Traceability Certification.
SPI 30-910-4 Grade 0 Steel 81 Piece Gage Block Set, 0.05 to 4, NIST Cert
SPI 81 Piece, 0.05 to 4″, Grade 0, Steel Gage Block Set, Rectangular, +10 – 5µ (3″), +12 – 6µ (4″), +4 – 2µ (0.050-1″), +8 – 4µ (2) Tolerance, NIST Traceability Certification.