Auxiliary fuel tank with built-in toolbox and 100% aluminum diamond tread plate. Tank Size (gal.): 51, Tank Dimensions L x W x H (in.): 50 x 20 x 12 3/4, Box Dimensions L x W x H (in.): 44 x 20 x 9, DOT Approved: Yes 51-gallon rectangle tank Tank size: 50in.L x 20in.W x 12 3/4in.H Toolbox size: 44in.L x 20in.W x 9in.H Comes with suction tube, manual sight gauge, baffles to reduce sloshing, return and drain fittings 9in. toolbox features two cylinders to help open crowned lid and stainless steel locks that also secure the fuel fill Fits some short beds; please measure before ordering Meets DOT standards It is the users responsibility to comply with local, state and federal requirements pertaining to safe transportation, loading and discharging of tank contents Not intended to be used for gasoline