Corrugated plastic or corriboard - also known under the tradenames of Polyflute, Coroplast, IntePro, Proplex, Correx, Twinplast, Corriflute or Corflute - refers to a wide range of extruded twinwall plastic-sheet products produced from high-impact polypropylene resin with a similar make-up to corrugated fiberboard. It is a light-weight tough material which can easily be cut with a craft knife. Manufacturers typically offer a wide variety of colors and thicknesses (quite commonly 4 mm).
Corrugated plastic is commonly used to erect commercial signs and for constructing plastic containers and reusable packaging. It is widely used in the packaging of automotive and electronic parts as well as agricultural produce. This is the material of choice for the screen printing industry.
The last decade has found increasing use among guinea pig, rabbit, domesticated hedgehog and other small pet enthusiasts as a component of a type of DIY cage. Additionally, it is used by members of the remote-controlled aircraft community to build nearly indestructible SPAD (Simple Plastic Airplane Design) model aircraft.