The Graf External Plastic Cabinet, which is installed with the bottom third section buried in the ground, is used when the control unit is housed outdoors. Sited within 20 metre of the Treatment Plant, it affords easy access for maintenance. Supplied with 2 integral power outlets, this cabinet is the ideal solution in cases where the STP is sited at a large distance from the house.It is made from sturdy plastic and is lockable. This item has an expected delivery time of up to 7 days.Please Note: Our sewage treatment plants do not qualify for our spend andamp; save volume discounts.