Blue Sea 8255 Digital Meter Shunt 500A/50mV 
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For use with DC Ammeters
For continuous operation, it is recommended that shunts not to be run at more than two-thirds (66%) the rated current under normal conditions
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.