The 288 Seeds & Cuttings Growing On Kityour 16 Piece Kit Comes With 2 Watering Trays, 2 Large Capillary Mats & 12 X 24 Cell Plug Trays.each Watering Tray Holds 6 Trays & Takes Up A Space 55cm Long By 30cm Wide & 4cm High.also Available With 24 Cell Plug Trays & 48 Cell Plug Trays.