9027.90.84.00/Refractometer Prism Assembly/Japan

Refractometer Prism Assembly from Japan

Sapphire prism with calibration scale for Abbe refractometers (9027.20). Critical for measuring refractive index of liquids. Classified 9027.90.84.00 as dedicated optical component.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Specify refractive index range and dispersion correction

• Anti-reflective coatings require optical treatment declaration

• Standalone prisms risk 9001 classification