Heavy duty 'Make and Break' relay suitable for On or Off applications where the ability to switch a higher current from a low source is needed. Normally Open configuration, the relay has an open circuit at rest. The integrated fixed bracket allows easy mounting. Can also be used as a split charging relay, simply wire the coil to an ignition feed or to a feed that becomes when the alternator is charging. M6 studs are for the switched high current circuit and are supplied with lock washers and nuts Supplied Individually Voltage Rating: 12v Current Rating: 200A Max Terminal Configuration: None Standard Number Of Terminals: 4 Terminal Size: 2 x 6.3mm Male Lucar Terminals (Pins 85 and 86) - 2 x M6 Studs (Pins 30 and 87) Bracket Type: Fixed Mounting Hole Size: 6mm Dimensions LxWxH (Including Terminals): 45x45x60 mm color: Black Material: ABSandMetal Package Contents: 1X 12V 200A Normally Open 4 Pin Relay 1X User manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.