Easy to apply: Remove protective backing from adhesive tape Powerful and lasting testament to our nation Sturdy aluminum and strong adhesive make for a durable symbol which will endure through all types of weather The Thin Blue Line Vehicle emblem is a powerful and lasting testament to our national law enforcement. ?The sturdy aluminum and strong adhesive make for a durable symbol which will endure through all types of weather. To display this emblem in your home, office, or on your car, is to show your unwavering support for the men and women that risk their lives for our country every day.