24x3 Custom aviation propeller ◄ Material ► CNC precision laser cut from 16 gauge steel, sturdy enough to withstand the elements and look great wherever you choose to mount it. ◄ Finishes Available ► -Black: This is our most durable finish, powder coated with a black protective layer to prevent scratches and rusting of metal. This finish will last the longest over time. ◄ Mounting ► Holes are added to signs for easy hanging, you can use finish nails, screws, or heavy duty double sided tape. We do offer .5” risers and screws for mounting, which can be found in our website. Larger sizes of all signs available upon request up to 47”.