DURABLE CONSTRUCTION: 2mm thick Dog Runs In Front of Cars signs are built from tough ACM (Aluminum Composite Material) which has a thick aluminum outer layer and a durable plastic core. These metal signs outlast plastic and corrugated signs by several years outdoors. EASY INSTALLATION: All signs come with 2 pre-punched and pre-cleared mounting holes for easy installation. Signs mount to U-channel posts, square or round galvanized posts, wooden posts, and chain-link fences. ROUNDED CORNERS: Our 80 mil signs have rounded corners and burr-free corners for safe handling, longer life and a professional appearance. MADE IN USA: All signs and their components are manufactured in the USA, offering superior construction quality and durability. PACK CONTENTS: Two 12 x 18 inch yellow and black signs. SmartSign Slow Down Dog Runs In Front of Cars Sign - 2-Pack, 12" x 18", 80 mil Thick Aluminum Composite (ACM), Pre-Drilled Holes, Yellow and Black, Made in USA