NDS Valve Boxes will stand up to the most demanding outdoor conditions while offering years of consistent service. Available in a range of colours and sizes to fit various applications. All boxes and lids contain UV inhibitors for sustained durability and performance in direct sunlight. They have corrugated sidewalls provide greater strength and stability and the reinforced covers withstand heavier loads. The overlapping covers also prevent dirt and grass from settling between the body and cover. The black / green design allows easy identification for residential use.