Core Dimensions Approx: 17 1/2″ high*26″ wide*2″ Thick (666mm*440mm*44mm), Overall Dimensions Approx: 23 1/4″ high * 29 1/2″ wide * 2 3/4″ Tank Thick (750mm*590mm*109mm), Upper Inlet: 1 1/2″ (38mm), Lower Outlet: 1 3/4″ (45mm)