... ,F1 calibration weight 3, ASTM class 0,1,2 weight 4, 1mg-500mg wire weight PREMIUM LINE CALIBRATON & TESTING EQUIPMENT INSTRUMENT/MODEL BRAND SET PRECISION ... , XP2004S ditto 1 0.1mg7, XP26003L ditto 1 1mg Single weight available: from 1mg to 20kgCustomized weight available. calibration weight