9 Full line of apparatus and instruments for scientific laboratory research use in the chemical and biochemical fields, namely, chromatography instruments and hardware, namely, chromatography columns, gas purifiers, valves, connections, adaptors, tubes, tools, degassing equipment, solvent recovery equipment, pressure gauges, and laboratory timers; laboratory supplies, namely, chemical filters, filter cartridges, laboratory glassware, chemical vials, tube holders, laboratory containers, sample extraction tubes, sample extraction manifold, laboratory tools for handling samples and adjusting laboratory instruments, and sample agitators; air monitoring instruments and supplies for measuring, testing and detecting contaminants and environmental pollutants in air, namely, air sampling pumps, air sampling tubes, and air sampling filters and filter cartridges