This listing is for ONE used Leeds & Northrup type 4222B 0.01 OHM Resistance Standard

NIST Calibration Certificate included.
Uncertainty of 0.01%, Calibrated(measured) by direct ratio comparison with lab standard resistors, measured 6 times
because of temperature coefficient of the meter and the standards and temperature time lags.

After buyer's payment, the final testing and packing will be video taped and it will be emailed to the buyer.