Conformance Certified To "NIST" for Extra Charge See below
Use as a toolcrib master, calibration master, quality control standard to check lead and parallelism of your micrometers
Stainless steel to reduce wear and prevent rust
Hardened, stabilized, ground and lapped to ± .0001"
Also Available in Metric. Inquire for Size and Price
WARNING: This Product Can Expose You To Materials And/Or Chemicals Which Are Known To The State Of California To Cause Cancer And/Or Reproductive Harm.