Or this , its 70mm wide.
http://www.reefshops.com/bio-pellet-reactors.html
MINI-70-C (removable) multi-filter:
1, with PH-300 pumps,
2, 100-800 ml can be adapted to filter material.
3, diameter 70 mm, height 420, plate size 100 * 100 (oval)
4, barrel body with 4MM thick acrylic tube, the outlet for the mini-tuning type, beautiful and convenient and practical base with removable +8 word hole, easy accessibility, the use of strong, safe;
5, using the water, the pump placed in the bottom of the filter (water), sump built, space-saving and efficient.