Streetwise Security Products Lab Certified Streetwise 18 Pepper Spray, 1/2-Ounce Soft Case, Purple Safety Lock; Sprays from inside the case; Attaches to your keys so you're always ready Independent Laboratory Heat Rating Certified; Derived from over 4 Million SHU; 46% Stronger than Competing Brands Instantly repels an Attacker; Incapacitates for up to 45 minutes; UV Marking Dye 46% Stronger than Competing Brands Derived from over 4 Million SHU** Independent Laboratory Heat Rating Certified