DURABLE: 'Fire Lane No Parking' signs last up to 7 years outside, these signs have prismatic Engineer Grade film mounted on 120 mil thick ACM (Aluminum Composite Material) which has a thick aluminum outer layer and a durable plastic core. EASY INSTALLATION. All signs come with 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. REFLECTIVE. Spot your warning at night. Don’t give anyone the excuse that they did not see your sign. SmartSign Basics have a 40cp reflectance rating compared to 20-30 cp rating in the market. UV OVERCOAT. Each sign has a clear UV resistant overcoat for enhanced durability, and chemical, weather and graffiti resistance. PACK CONTENTS: Four 18 x 12 inch red and white reflective aluminum sign. SmartSign (Pack of 4) 18 x 12 inch "Fire Lane - No Parking, Tow-Away Zone" Sign, 120 mil Thick Aluminum Composite (ACM), Engineer Grade Reflective Material, Red and White