force gauge,Model: NK-10 NK-20 NK-30 NK-50 NK- ... 30N 50N 100N 200N 300N 500N force gauge,tension calibration Force Gauge,epush-pull force gauge,mechanical force gauge,force tester,dynatension,tension meter, force ... .05N0.1N0.2N0.25N0.5N1.0N2.0N2.5N Accuracy:±1% mechanical force gauge