This is the Bueler BU5078 12 volt high current relay. This relay can handle up to 120 amps of current (which is HUGE!). This is an SPST relay (single pole single throw).

Features:

• Heavy Duty Relay - 120 Amp @ 12VDC
• Water resistant
• SPST contacts with standard top mounting and heavy duty bolt on terminals.
• Coil requires two .25" quick disconnects