The easy2grow Extension Kit other wise known as the 2Pot Extension Kit is simply added onto the easy2grow kit to extend the system. The extension Kit is supplied with the following; 1 x 2Pot tray & lid 2 x 8.5ltr pots 2 x Marix discs - the Marix discs are placed inside each of the pots to prevent soil/compost from leaving the pots 2 x Root Control Discs - the RCD's are placed in the tray under each pot, gold face up. The RCD's will prevent roots from leaving the pots and discourage them from heading towards the AQUAvalve. 1 x single AQUAvalve with the 2Pot Extension Kit is placed in between the pots. 1 x 1 meter of pipe 1 x 9mm Tee for easy connection to the easy2grow Kit or existing systems.