Specifications include, but are not limited to: 3.1 GROUP 1: 3.1.1 Street name blades are to be rectangular, extruded, anodized aluminum with no holes, minimum 0.080-gauge thickness, 6063 T6 alloy in the stated sizes. 3.1.2 Faces are to be 3M 3930X White or Yellow High Intensity Prismatic (Type IV) with Opaque Adhesive on both sides of the blade. 3.1.3 The blades must be packaged in a way to protect the material, i.e., placing paper between blades. 3.2 GROUP 2 3.2.1 Street name blades are to be rectangular, extruded, anodized aluminum with no holes, minimum 0.080-gauge thickness, 6063 T6 alloy in the stated sizes. 3.2.2 Faces to be 3M DG3 Type IX White or Yellow Grade on both sides of the blade. 3.2.3 The blades must be packaged in a way to protect the material, i.e., placing paper between blades.