The versa flex #2 classic is the original model with a 90 mil round reservoir and easy pop lid. And Istead of The swing arm return lines  with plant  site equalizer loop line with a dual shutoffbuilt in for extra easy draining from either end. This kit comes with everything listed below:* (1) 90 mil food grade 5G reservoir (2) 3/4” return ports, (1) 1/2” feed line port,            (1)1/2” drain water level indicator port. With water level indicator installed* (2) 90 mil food grade 5G plant sites with  (2) 3/4” outlet ports, (1) 1/2” feed line.                      Port* (2) 3/4” valved return line arms* (1) 1/2” stabilizer loop line* (1) 1/2” 2 site valved feed line setup* (1) water pump* (1) 4.5W dual port Versa AIR aerator pump* (2) Versa AIR air stones* (3L) expanded clay pebbles* (4) starter Rockwool cubes * (4 yds) green gecko 100% food grade silicone airline* (1)  reservoir lid* (2) 6” net lids with dual quick connects** and like every system you get our quality gauranteed or money back and 30 day any reason returns. (See details on return policy)