Calibrated charts include a data sheet specifying tolerances of each feature.  

Calibrated to accuracy of +/- .0025"

Data sheets are prepared individually and include a numbered sticker and certificate with matching serial number.

Calibration performed by ANAB - ISO/IEC 17025 accredited laboratory.

View details for each chart type by looking at our non-calibrated versions below:

SEC

SEC-1

SEC-2