Diameter: 5-1/4″Depth: 2-5/8″Polycarbonate Body with Brass TerminalsIgnition ProtectedFor use with 6 to 32 Volt Marine Electrical SystemsCapacity – 250 AMPS Continuous, 360 AMPS 5 Mins. IntermittentTerminal Stud Size: 5/16″When used with Non-Unitized Alternators, these models will interrupt the field current (reducing the possibility of damage) if turned “OFF” with the engine running. Specifications:AFD: YesLockable: NoPositions: 2Continuous Amperage: 380aBox Dimensions: 4″H x 4″W x 8″L WT: 2.25 lbsUPC: 085226021558Quick Guide (pdf)