Aqueon Proflex Hang-On Overflow Box - Aquariums Up To 125 Gallons

The Hang-On Overflow is for use in aquariums that would benefit from sump filtration, but lack pre-drilled holes for sump intake and return. Any aquarium up to 125 gallons. Size: 8.5 InchL x 6.25 InchW x 11.5 InchH