86080090000 under HS Code RAILWAY OR TRAMWAY TRACK FIXTURES AND FITTINGS; MECHANICAL (INCLUDING ELECTO-MECHANICAL) SIGNALLING, SAFETY OR TRAFFIC CONTROL EQUIPMENT FOR RAILWAY, TRAMWAYS, ROADS, INLAND WATERWAYS, PARKING FACILITIES, PORT INSTALLATION OR AIR-FIELDS; PARTS OF THE FOREGOING - RAILWAY OR TRAMWAY TRACK FIXTURES AND FITTINGS; MECHANICAL (INCLUDING ELECTO-MECHANICAL) SIGNALLING, SAFETY OR TRAFFIC CONTROL EQUIPMENT FOR RAILWAY, TRAMWAYS, ROADS, INLAND WATERWAYS, PARKING FACILITIES, PORT INSTALLATION OR AIR-FIELDS; PARTS OF THE FOREGOING : OTHER, 90221990000 under HS Code Others, and 85311090000 under HS Code ELECTRIC SOUND OR VISUAL SIGNALLING APPARATUS (FOR EXAMPLE, BELLS, SIRENS, INDICATOR PANELS, BURGLAR OR FIRE ALARMS), OTHER THAN THOSE OF HEADING 8512 OR 8530 - BURGLAR OR FIRE ALARMS AND SIMILAR APPARATUS: OTHER were the top imported HS Codes by CIRCUIT SOLUTIONS INC in 2021.