... voltage:20mv,30mv,50mv,75mv,100mv and so on3.FL-21 series export type shunt,precision class 0.5 Specifications:1A ... shunt,American shunt and so on.Technicial parameters: 1. FL-21, 5-125A, 150 - 200A, 250 - 600A, 800 - 1,500A, and ... , higher accuracy and current capacity of up to 25,000A. RS-300A