My new rib I am having made at a local machine shop is 4061 Aluminum, Starting Dimensions are 30"inches Long X 3/8Ths wide X 1.250 Tall, with a taper from 1 1/16th to 1/8th. To make it lighter yet I am having him come up with slots or holes drilled in it. I then will have it powder coated Black with the bottom being non-coated so Adhesive will stick to it. Will post pics when done Dr.longshot