(Compare to DP90) The Mammoth Propagator is a unit designed specifically for propagation, with many of the benefits of a Mammoth tent and a waterproof tray bottom. DP3: Propagation, station all in 1: Mother plants, Propagation, Growing, Blooming Up to 2 x 77 Rockwool cubes trays compatible Optional Hydro-Tray 1 x 23.6' x 15.7' inch available Transverse venting windows system