HS Code for Mounted prism

Mounted prisms are classified under HS code 9002.90. Chapter 90 covers optical, photographic, and cinematographic instruments. Heading 9002 specifically addresses lenses, prisms, mirrors, and other optical elements, of any material, which are "mounted," meaning they are fitted into a frame or support that allows them to be installed into an instrument or apparatus. Subheading 9002.90 is the "other" category for mounted optical elements that are not lenses or filters. Prisms are used to deviate, invert, or rotate light beams. To be classified here, the prism must be "optically worked," meaning its surfaces have been processed to produce the required optical properties. If the prism is not mounted, it would fall under heading 9001. The mounting distinguishes these items from raw glass or unmounted components, as they are ready-to-use parts for complex optical systems like telescopes, microscopes, or surveying equipment. This classification applies regardless of the material of the prism (glass, plastic, or crystal), provided it is optically worked and mounted.

Products Included

• Mounted roof prisms for binoculars
• Mounted Porro prisms for optical instruments
• Mounted beam splitters (prism type)
• Mounted dispersing prisms for spectrometers
• Mounted retroreflectors (corner cube prisms)

Common Misclassification

The most frequent misclassification is using 9001.90, which is for unmounted optical elements. The presence of a permanent mount or frame is the deciding factor. Another error is using 7014.00, which covers signaling glassware and optical elements of glass not optically worked. If the prism is part of a specific instrument and imported with it, it may be classified under the heading for that instrument (e.g., 9005 for binoculars). Finally, mounted mirrors are sometimes confused with prisms but are specifically mentioned in the same heading.

FAQ

What is the HS code for Mounted prism?

The HS code for mounted prisms, being parts or fittings for instruments or apparatus, is 9002.90.

What does "optically worked" mean for this classification?

"Optically worked" means that the surface of the prism has been ground and polished to achieve specific optical effects. Elements that are simply moulded or cast without further polishing do not qualify for Chapter 90 and may fall under Chapter 70 (Glass).