8mm Coroplast is a very thick option for this substrate. It is usually printed on with a wide format device. Coroplast is a corrugated plastic sheet that is extremely durable because it is water and stain resistant. Coroplast signs have a variety of purposes and are most offend used for real-estate signs, political signs and yard signs. Lawn based signs usually require H frame, but they should be ordered at the same time so that the flute is aligned in the proper direction of your printed piece. Some A-frames support slide in Coroplast sheets, allowing for easy changing of artwork. You may also want to consider adding a QR code, your customers prospects can easily get additional information by quickly by scanning your qr code and linking to your customers website. This is all done via their mobile device and is growing in popularity.