Shadowgraph Screen Calibration Reticle from Canada
Precision etched glass reticle mounted on the projection screen of shadowgraphs (profile projectors under 9031.80.40) for scale calibration and accuracy verification. Essential for maintaining measurement traceability in metrology labs. Classified as a part under HTS 9031.90.70.00.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Certify NIST-traceable calibration standards with shipment documentation
• Specify screen mounting design unique to shadowgraph models
• Avoid classification as optical elements (9001) by proving machine-dedicated use