1 Color Ink / Double Sided. Send us the Text and/or Graphics you want on your signs and one of our. Graphic Design Artists will send you a proof before production begins.This offering does not include stakes. The item "50 12x18 Double Sided Custom Coroplast Signs" is in sale since Wednesday, August 1, 2018. This item is in the category "Business & Industrial\Retail & Services\Business Signs". The seller is "modemvater" and is located in Tulsa, Oklahoma. This item can be shipped to United States.