770007 is concentric ring probe may be used for the resistance measurements of ESD packaging including static shielding and other bags. Maintains consistent contact between the fixture’s conductive rings and the material under test. This probe compatible with the surface resistance meters like resistance pro meter kit, resistance pro meter, analog surface resistance megohmmeter kit, analog surface resistance megohmmeter and surface resistance meter. Concentric ring probe is compatible with the 770760 resistance pro meter kit, 770761 resistance pro meter, 701 analog surface resistance megohmmeter kit, 701-M analog surface resistance megohmmeter, SRMETER2 surface resistance meter.