90273010 under HS Code INSTRUMENTS AND APPARATUS FOR PHYSICAL OR CHEMICAL ANALYSIS (FOR EXAMPLE, POLARIMETERS, REFRACTOMETERS, SPECTROMETERS, GAS OR SMOKE ANALYSIS APPARATUS); INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING VISCOSITY, POROSITY, EXPANSION, SURFACE TENSION OR THE LIKE; INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING QUANTITIES OF HEAT, SOUND OR LIGHT (INCLUDING EXPOSURE METERS); MICROTOMES - SPECTROMETERS, SPECTROPHOTOMETERS AND SPECTROGRAPHS USING OPTICAL RADIATIONS (UV, VISIBLE, IR): SPECTROMETERS and 70191200 under HS Code GLASS FIBRES (INCLUDING GLASS WOOL) AND ARTICLES THEREOF (FOR EXAMPLE, YARN, WOVEN FABRICS) - SLIVERS, ROVINGS, YARN AND CHOPPED STRANDS : ROVINGS were the top imported HS Codes by G&W TRADE LIMITED COMPANY in 2021.