photo not exact, unit is black, magnet is larger

Sea Side Aquatics SL 3 Nano Skimmer BLACK COLOR
Size 4.33" by 3.14" by 15"
Rated up to 75gal
Use DC Pump
Comes with Magnet Bracket, Up to 3/4" Thick

Internal skimmer, can be placed in corner of aquarium or in a sump area