Lightweight all aluminum reflector with galvanized steel back plate. Made of 95% reflective German aluminum. Fully assembled reflector portion, just attach the socket assembly and you’re done. Side and end steel stiffeners for improved rigidity of the reflector. Detachable 15 ft lamp cord at the reflector and at the ballast. Dimensions 34 in long x 29 in wide x 8-1/2 in high. Bulk 20 pack box saves shelf space and decreases freight costs. Sockets package separately. US Patents: D726,116. US Patent Pending: 29/520,168. Chinese Patent: ZL201330582324.7. Sold to retailers in increments of 20 only.