Swiss Precision Instrument Inc 87877700
8 Piece, 5 to 20", Grade 0, Steel Gage Block Set;Rectangular, 0.000007, 0.000008, 0.000009, 0.00001, 0.000012, 0.000014, 0.000016, 0.000018, 0.00002, 0.000024, 0.000028, 0.000036, 0.00004" Tolerance, NIST Traceability Certification