SPI 30-912-0 81 Piece, 0.05 to 4", Economy Grade, Steel Gage Block Set

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

81 Piece, 0.05 to 4", Economy Grade, Steel Gage Block Set Rectangular, 0.00005" Tolerance, NIST Traceability Certification

81 Piece, 0.05 to 4", Grade AS-1, Steel Gage Block Set Rectangular, +16 - 8µ (2"), +20 - 10µ (3"), +24 - 12µ (4"), +8 - 4µ (0.050-1") Tolerance, NIST Traceability Certification

36 Piece, 0.05 to 4", Grade 0, Steel Gage Block Set Rectangular, +12 - 6µ (4"), +4 - 2µ (0.050-1"), +8 - 4µ (2") Tolerance, NIST Traceability Certification

81 Piece, 0.05 to 4", Grade 0, Steel Gage Block Set Rectangular, Nist & NVLAP Traceability Certification