Calibration Weight Nominal Mass 500 x 2.5 lb Calibration Weight Class 7 Calibration Certificate No Certificate Calibration Weight Style Slotted Calibration Weight Material Cast Iron Measurement Type Avoirdupois Number of Pieces 1 Finish Painted Calibration Weight Compliance Agency ASTM Overall Height 1.437 in Overall Length 3.5 in Calibration Tolerance 470 mg