The spring balance becomes very popular because of its simple operation as well as its independence from place where it is used. Tublike DynamometerModel No. XY-703N1Max Capacity:100N,150N,300N,500NWhat's more,we have another one model, XY-703N,which is can test 10N-50N,100N,200N,300N,500N,1000N.We also product dial spring scale, table scale,electronic scale,height scale, waterproof scale, ...