... the world 1.Standard type:1.FL-2 series type shunt ,precision class 0.5 Specifications:1A-15000A Secondary voltage:20mv,30mv,50mv ... ,100mv and so on .3.FL-21 series export type shunt,precision class 0.5 Specifications:1A-6000A Secondary voltage:20mv,30mv,50mv ... ,75mv,100mv and so on4.FL-12 series type shunt ...