Component parts for liquid chromatography and other analytical, synthetic, and sample preparatory techniques, namely, guard columns, plastic tubes and stainless steel tubes, capillaries, cartridges, discs containing chemically interactive and reactive solid media in particulate or monolithic form for use in chromatography; solid-phase extraction supports, namely silica and polymer packing material being packed bed separation apparatus; precolumns; trapping columns; filters, plastic and stainless steel tubing, valves, namely check valves, outlet cartridge check valves, priming valves, injection valves; maintenance components for liquid chromatography and other analytical, synthetic and sample preparatory techniques, namely, couplers, hand tight fittings, stainless steel fittings, plugs, connectors, couplers, ferrules, nuts, screws, seals, rotors, stators, pump heads, lamps, pistons, flow-back through pressure regulators, bushings, all of the foregoing component parts and maintenance components being for scientific and laboratory instruments designed to perform liquid chromatography and other analytical, synthetic, and sample preparatory techniques, and for instruments designed to perform fluid transfer in scientific instruments, said instruments for use by those working in the fields of liquid chromatography (LC), mass spectrometry (MS), liquid chromatography combined with mass spectrometry (LC/MS), and gas chromatography (GC)