Robinair Calibration Verification Weight for 34988 34788 and 34288 units (1.18lbs.). Easily maintain your units accuracy with this handy calibration weight. Ships with each new unit. This is a factory part, calibrated for accuracy.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov