Overall: 1.17" x 0.7" (H x Diam) STATEMENT OF ACCURACY: Calibration weight : 50 g. Includes nominal weight value and tolerance for respective weight class. Not a legal for trade or traceable document. Function : metric calibration weight for calibrating the weights, or electronic balances and scales. Material: steel construction of calibration weight for stability, Made of steel chrome, this weights are absolutely not rust and defect free.