This may sound completely stupid, but I have no idea what this is (brand/model/ect). I know it's a pump, but there are absolutely no markings on it whatsoever to indicate brand/model. It was given to me with my 55G along with some other misc stuff. Help me out?
https://lh4.googleusercontent.com/-...AAPU/vw64mIe1ui8/s912/IMG_20110919_213538.jpg
https://lh4.googleusercontent.com/-...AAPU/vw64mIe1ui8/s912/IMG_20110919_213538.jpg