40091100 under HS Code TUBES, PIPES AND HOSES, OF VULCANISED RUBBER OTHER THAN HARD RUBBER, WITH OR WITHOUT THEIR FITTINGS (FOR EXAMPLE, JOINTS, ELBOWS, FLANGES) - NOT REINFORCED OR OTHERWISE COMBINED WITH OTHER MATERIALS : WITHOUT FITTINGS, 84818090 under HS Code TAPS, COCKS, VALVES AND SIMILAR APPLIANCES FOR PIPES, BOILER SHELLS, TANKS, VATS OR THE LIKE, INCLUDING PRESSURE-REDUCING VALVES AND THERMOSTATICALLY CONTROLLED VALVES - OTHER APPLIANCES: OTHER, and 85371000 under HS Code BOARDS, PANELS, CONSOLES, DESKS, CABINETS AND OTHER BASES, EQUIPPED WITH TWO OR MORE APPARATUS OF HEADING 8535 OR 8536, FOR ELECTRIC CONTROL OR THE DISTRIBUTION OF ELECTRICITY, INCLUDING THOSE INCORPORATING INSTRUMENTS OR APPARATUS OF CHAPTER 90, AND NUMERICAL CONTROL APPARATUS, OTHER THAN SWITCHING APPARATUS OF HEADING 8517 FOR A VOLTAGE NOT EXCEEDING 1,000 V were the top imported HS Codes by HI TECH TECH SERV & SUPPL CO in 2021.