Aquarium overflow box with lid - Surface skimmer for drilled tank
CS100 Aquarium Overflow Box
10" Overflow Box
Tunze Overflow Box - overflow
Amazon.com : Jacksking Overflow Box for Aquariums, Inlet Overflow Box Acrylic Self-Start Siphon Hang On Overflow Box for Fish Tank Aquarium : Pet Supplies
4" x 1.5" x 4" Overflow Box Internal Reef Aquarium Surface Skimmer