Check the listing for details. (2 pcs) 4mm Blue 18 in x 12 in Corrugated Plastic Coroplast Sheets Sign. Condition: New. Listed at 3.66 USD. This listing is for 2 pcs 18" x 12" 4mm Coroplast corrugated twin wall blue sheet. Coroplast corrugated sheets are ideal for screen printing. Coroplast is able to be used in indoor and outdoor applications. While tougher than fiberboard, it is also lighter than standard extruded plastic sheet of the same thickness. Allows for adhesives to adhere and is 100% recyclable. Coroplast is very durable, versatile, and reusable when used as a packaging material and other applications. 1. Easily manipulated, i.e. cut, folded, scored, etc. 2. Lightweight 3. Weather resistant 4. Flutes run 12" length Many other sizes, colors and qty's available. Contact me with specifics. Will Combine Shipping All orders processed and shipped by Duco Plastics and Supply. Color is Granby Blue