Top Lid Helps maintain an ideal temperature for rapid growth Sprinkler Sprinkles water and supplies air. Seed Trays The Seed Trays have two different sized tabs on the bottom and top. The side with the larger sized tabs should always face upward. Upper Tray : Shown w/ Larger Tabs upward. (Laid on top of seeds. Lower Tray : Shown w/ Larger Tabs upward. (Where seeds are spread. Water Tube Channels water to the sprinkler Sprout Barrel Sprouts are grown in here Water Barrel Reservoir and supplies water for cultivation. Water Pressure Control Tube Controls the quantity of water How to Control Water Pressure As seen in the drawing, turning the control knob to clockwise will decrease the water pressure and to counter clockwise will increase the pressure. Motor Chamber Holds a specially designed pump with a temperature sensor. Optional Expansion Sprout Barrel Set Sprout Barrel Upper Tray Lower Tray Water Tube Assembly Stainless Steel Clips Allows you to grow twice as many sprouts! More details available on the features page. Shown below are the clips for the expansion kit.