Our Thin Blue Line Rectangle Pin is made with a jeweler's metal cloisonné process, black and blue enamel color filled, nickel plated and polished smooth-to-the-touch. The black flag represents the fallen police officers who have proudly served. The blue stripe is what police officers protect, the line of law and a civilized society. These policemen and women dedicate and sacrifice to protect our streets every day. This is the perfect pin to remember the officers that give their lives to protect us. Each of the Thin Blue Line Rectangle pins includes a standard clutch back and are individually poly bagged.