The Desco 19293 is one pair of electrode spacers, 10" and 36" in length.
Please note: this item is only the spacers and does not include the electrodes or meter.
They are used to space the 5 lbs electrodes to 10" and 36" for resistance point-to-point (Rtt) measurement requirements of ANSI/ESD S.1 and ANSI/ESD S4.1