10 Pack Sign Blanks Black 7x10 PVC For Crafting, Painting, Vinyl, Safety, and Parking lot Signs. These sign blanks are great for self adhesive stickers, crafts, and even have holes for mounting the sign blanks. The 7x10" PVC sign blanks are 2mm or .080" thick and have a black finish on one side. These sign blanks are rust proof and made from high quality PVC plastic. These sign blanks are the safety osha standard 7"x10" sign for communicating safety hazards.The perfect OSHA 7x10 sign blank. The sign blanks work perfect for dye cut vinyl, stickers and painting or applying osha and safety decals. The easiest sign blank to use, they come black on one side and white one the other with rounded corners and pre drilled corner holes.