Listing includes one 1/2″ x 12″ x 24″ long plate made from 6061 Aluminum. Buy as many as you need. Thickness tolerance: -.002″ to +.002″ Width tolerance: +.000″ to +.125″ Length tolerance: +.000″ to +.125″ Temper: T651 Meets specs: ASTM B209 Machined Finish (There will be some normal scratches/nicks on Aluminum. This item is not intended to have a finished surface)