Valve Box - 12" Standard (Rectangular) with lid. High strength, high density polyethylene constructed material. T-Top lid provides maximum lid strength. All boxes have Green Top. 20.75"x15.5"x12.375".......... IMPORTANT: When ordering valve boxes, UPS, USPO, etc charge for the weight that COULD occupy the space taken up by the item, not the actual weight. Example: Jumbo box weight 17 LBS, UPS charges for 36LBS. If you order the box, you should consider buying enough stuff to fill the space inside the valve box.