On-line wholesale and retail store services featuring testing instruments in the nature of gas pressure leak detectors, electrical devices that convert electric power provided as single phase to multiple phase or vice versa, measurement tools in the nature of analog and digital meters to measure electrical quantities, water pressure, and indoor air quality, portable electronic instruments and tools in the nature of electrical multimeters, electrical values testers, and liquids flow meters, pipe, valves, and fittings for use in transferring liquids from tankers to storage facilities and regulating tanks, automotive parts, industrial label printers and printer supplies in the nature of ribbons and labels