Precise Micrometer Check Gage Block Set 12 Pieces 

Features

• For checking various spindle positions of entire micrometer range.
• Meet or exceeds U.S. Federal specification GGG-G-15C and ISO 9000 requirements.
• Gauge blocks include: .105, .210, .315, .420, .500, .605, .710, .815, .920 & 1.000".
• Optical flats for checking micrometer flatness are .500 & .5125"
• Manufacturer's calibration certificate included.
• Completed with fitted case.