Product OverviewPermits current to be carried by either of 2 batteries, by 2 batteries simultaneously or cuts off all current at source. Ignition protected. Plastic case, knob and insulator. Four positions: OFF, ON-#1 Battery, ON-both batteries, and ON-#2 battery. Rating 6-36V DC; 310A Continuous, 500A intermittent 3/8" copper studs Size 6" flange diameter , Overall Height 2-5/8" Installation surface mount or install through a panel with a 3-5/16" dia. hole UL Listed. Marine UL ListedSpecifications Size: 6" Dia. x 2-5/8" Type: 1, 2, Both, Off Product Details Brand: Cole Hersee Product Type: Battery Management Manufacturer Part Number: M-750-BP UPC: 632850519601 LNS Category: Electrical LNS Subcategory: Switches Dimensions: L 11 in × W 7 in × H 3 in Country of Origin: MX Compare the manufacturer part number, dimensions, fitment, voltage, material, and included components with your application before ordering.Enjoy free standard shipping on all U.S. orders, including Alaska, Puerto Rico, Guam, U.S. territories and protectorates, and eligible P.O. boxes.