Manufactured using a unique low pressure structural foam process. Dimensions are 10 inch diameter at top, 11-1/2 inches inside diameter at bottom, 13 inch OD diameter on lip at bottom, 10-1/2 inches high. Color green. For use in non-vehicular traffic areas only. Can be used with conventional ground rods or chemical rods for testing resistivity.Weight 4-1/2 lbs.