Lifereef overflow box, standard size, two U Tubes and filter.
Asking $50 or may take a trade for SPS .
Here is the website of the guy that makes them:
http://www.lifereef.com/siphon.html
It has never lost its siphon and worked great for me. I am selling it because I had to move my tank to lay new flooring so I figured I may as well drill it when it was empty.
