Blue Sea 8242 Shunt Adapter for DC Digital Ammeter 
Shunt Adapter for DC Digital Ammeter positive side shunt applications, such as alternator measurement
The Shunt Shifter is designed for use with Blue Sea Systems 8255 Digital Meter Shunt
Advanced technology shifts the shunts positive reference to negative as required by digital meters
Easily installs directly onto shunt using existing sense screws
Ideal for use with 12-36 Volt DC systems
Includes all necessary hardware
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.