These OIML Class F1 calibration weights are designed for testing and calibrating digital scales. They are made from nonmagnetic stainless steel which makes them suitable for electronic balances. Solid, one-piece construction. A protective plastic case and white cotton glove are included. These weights are very precise and should not be handled with ungloved hands to prevent skin oils from changing the accuracy of the weight. NO CERTIFICATE INCLUDED.
Once shipped, calibration weights cannot be returned for a refund. These weights require extreme care and there is no way for us to tell if a weight has been mishandled by a customer without costly recalibration.