Reef Octopus Needle Wheel Protein Skimmer - NWB 150. 

It's exactly like this model here except the canister shape is different since they change the shapes pretty often: http://www.aquacave.com/reef-octopus-nwb-150-br-needle-wheel-protein-br-skimmer-749.html 

 

We bought this about three years ago, used it until about 6 months ago, and it's worked perfectly the whole time.  Changed our setup so we just don't need it anymore.  Includes the needle wheel pump, the OTP-2000 (2000 liters per hour, about 530 gallons per hour).   The new NWB 150's retail for $199 and the only difference is the cylinder shape has been slightly changed.

The manufacturer (CoralVue/Aquacave) is very easy to work with if ever replacement parts are needed.  This skimmer has all parts and is in excellent condition though.

Don't worry, it's not dirty inside.  Just got normal fishtank usage color to it! 

Great buy for someone who wants to save money setting up their new marine tank or wants a great backup skimmer!

Any questions, feel free to ask!!