Item Name: Yacht Car Starter On/Off Power Switch Dual Battery Isolator 12V AMP 500A Relay. Operate Time: 25msMaterial: Metal/PlasticDielectric Strength Between Open Contacts 500VAC (for one minute/sec)Between Contact and coil: 750VAC (for one minute/sec)Release Time: 10msInsulation Resistance: 100m ohm Min at 500VDCSize app: 5*7.4*7.6cm,Bottom Hole Max Length 6.7cm,Bolt Dia 0.8cmVibration Resistance: 10 to 55Hz, 1.5mmShock Resistance:Operations Extremes: 10g,Damage Limits: 100gType: Starter Solenoid RelayName:Car Starter Dual Battery Isolator RelayTemperature Range: -30Celsius to +80CelsiusColor:BlackPackage Includes:1* 500A Relay Note:1.Please allow 1-3mm error due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! *Please make