RAB Lighting 17" PVC mounting post for lighter weight ground mounted landscape lighting. Post is 2" pipe (2 3/8" O.D.) for cleaner look. In-ground stabilizing grid included. UL listed: Suitable for wet locations. Fixtures with ground wire must be used. Set screw: Locks cap to post and prevents rotation. Post material: UL Schedule 40 PVC pipe. Cap: PVC. Patents: Pat. D424,524. This product is a product of Taiwan and a "designated country" end product that complies with the Trade Agreements Act. Gsa schedule: Suitable in accordance with FAR Subpart 25.4.