I have added some pictures of it here . For reference, it is next to my parents' 56 inch television. Sorry for the poor image quality, the camera seems to have been acting up.
Since I am no longer using it in my system (I switched to a tempest-based sub) I have decided to sell it to someone who could use it rather than having it take up space in the basement. Specs are 24 inch diameter sonotube, approximately 300 liters tuned to 18hz. Would prefer to sell locally...