Extremely durable 110 x 55 x 5 cm / 43″ x 21.5″ x 2″ tray made from recycled polypropylene and adapted for the usage in the InstaGreen Cultivation systems (bottom watering) and Germination Racks (top watering). Each Smart Tray can be filled with 40 InstaGreen cups. This equals 4 1020 trays. A series of shallow horizontal ridges feature on the internal base of the tray which aid watering and drainage in the InstaGreen Cultivation Systems.