Tariffs are based on the Country of Origin (COO) listed on the product, not the shipping location. For example, a product marked COO China will face a tariff even if shipped from Europe to the U.S. However, parts marked COO Malaysia shipped from China will not be taxed.
U.S. Customs and Border Protection imposes the tariff on the carrier (e.g., FedEx or UPS), who then passes the fees to the recipient. When purchasing from Fusion Worldwide, the tariff on COO China items is included in the price, so no additional charges will apply upon delivery.