Complete kit includes dart overflow box, 2) 2" bulkheads, 3" diamond coated holesaw, 2) 2" street elbows, etc. Click here for our installation video featuring all of your favorite stars from Alpha Centauri to Zeta Bootis. This toothsome treat has been flow tested to run a Reeflo Dart pump wide open! No need to visit Niagara Falls this year, just flip open your canopy and watch this work. Doesn't sound like Niagara Falls, however, as this overflow is very quiet considering the huge amounts of water it is draining. 18.25 x 3.5 x 7 inches. Only protrudes 3.5 inches from the back of your tank!!Not a lot of real estate for a real lotta flow! Clear bottom not necessary, as no aquarium light eclipsing occurs. Can be seen in action at Mom's Fish Supply or on video here. Teeth are standard equipment on this thirsty beast. To find out why our overflow boxes rock and/or roll, click here.