When certain areas contain highly flammable materials, prevent fire emergencies from happening with the "Flammable" sign. This 4" x 20" sign can catch everyone's attention thanks to its bright red color that contrasts with the text. It is also available in three durable materials, which can resist environmental elements like the weather and moisture. This information sign is also easy to install. Adhesive vinyl signs have a strong adhesive backing that lets you stick to clean and dry surfaces, while aluminum and plastic signs have pre-drilled mounting holes and radius corners. General sign Available in 3 material options Aluminum: corrosion-proof and UV-resistant Plastic: moisture and weather-resistant Adhesive vinyl: weather, moisture, corrosion-resistant Indoor and outdoor use Pre-drilled mounting holes Radius corners Adhesive backing for adhesive vinyl Sizes: 4"x20"