TekNet Electronics sells refurbished electronic test equipment manufactured by Agilent, Fluke, HP, Keithley, Marconi, Rohde & Schwarz, Tektronix and many others. TekNet Electronics equipment service partners "OpLink Solutions" and "Instrument Calibration Service" are test equipment repair and calibration specialists offering post sale support for most items we sell. Contact TekNet Electronics at 877.449.3760 or visit www.teknetelectronics.com