Breathing Appliances & Gas Masks (NESOI), Parts & Accessories

Line 9020004000 covers self-contained underwater breathing apparatus (SCUBA) and similar devices designed to be carried on the person for underwater use. Line 9020006000 captures all other breathing appliances and gas masks with mechanical parts or replaceable filters — such as industrial respirators and SCBA units for above-water use — that are not described by the underwater-specific line or by a more specific heading elsewhere in the schedule.

Industrial and occupational respirators intended for workplace use may need to meet NIOSH approval standards (administered by CDC/NIOSH) to be marketed in the US, though NIOSH approval is a product-certification requirement rather than a CBP admissibility requirement at entry. Military or defense-related breathing apparatus may be subject to export controls in the country of origin and import licensing considerations. Importers should verify applicable product standards with their compliance counsel before procurement.