18''W x 24''H x 4mm Yellow High Quality polypropylene corrugated board, treated with corona on both sides for printing purposes. Available in a variety and sizes and colors, to be utilized with out sign stakes or A-Framesto make sure you get the attention of your customer paired with the basic accessory stake for corrugated plastic blanks. The prongs fit into the vertical flutes and the stake goes in the ground. Used with real estate signs, election signs, yard sale signs and more Works with 4 mil corrugated plastic signs. (CB18-24W x ESS1030)The prongs fit into the vertical flutes and the stake goes in the groundUsed with real estate signs, election signs, yard sale signs and moreWorks with 4 mil corrugated plastic signs.