The AeroFlo 60 extension is an add-on for the AeroFlo60. This system includes: 45 gallon reservoir,12 - 6 ft. grow chambers (normally only offered with 6 - 6ft grow chamers), Injection manifold, support structure,120 - 3" Grow Cups(Normally only offered with 60 - 3" Grow cups), Two 9 LTR bags of Hydroton clay pebbles, One 3.785 liter bottle of FloraGro, and One 3.785 liter bottle of FloraBloom. Everything that you see listed here is right out of the box.6 out of the 12 grow chambers had water in them due to a leak in my attick, but other than that this extension system is virtually brand spanking new and sells for $750+ on most websites.