PLT adheres to the strictest quality control and quality assurance procedures in the ballast and lamp industry. Each PLT product is tested under the toughest conditions and meticulously factory checked for defects in materials to reach you in perfect condition. This lighting pole base cover is designed to be durable and easy to secure around the base of the pole. It is 10.75 inches by 10.75 inches, with a height of 4 inches. It's designed for use with 4 inch by 4 inch square poles.