Spectacle & Goggle Frames of Materials Other Than Plastics

Classification of combination frames depends on the material that gives the frame its essential character, typically the predominant material by weight or the material forming the primary structural component. A frame with a metal front and plastic temples may be classified under 900319 if the metal front is considered the defining structural element, while a predominantly plastic frame with metal hinges would typically remain under 900311. CBP has issued rulings on specific frame constructions, and a binding ruling is advisable for novel designs.

Material certifications from the manufacturer, mill test reports, or third-party laboratory analysis confirming alloy composition are the standard documentation for premium metal frame claims. This matters not only for classification but also for customs valuation, as titanium and beta-titanium frames command significantly higher transaction values than standard steel or aluminum frames, and CBP may scrutinize declared values against known market benchmarks.