double ventilation system thick quality plastic 1 set of grow lights (4 blue, 16 white leds) (on/off, dimming levels (20%, 40%, 60%, 80%, 100%), timer setting (3, 6 or 12 hours) 2 40 cell seed starter trays with domes gardening tools 14.8" long, 9.4" deep seedling tray is 2.1" tall dome is 3.5" tall 1 tray has been used for a few weeks but was cleaned out and is still in perfect shape