Fox Labs 5.3 Million SHU UV Marking 1/2 oz Black Hard Case Keychain Pepper Spray Police strength world's hottest 5.3 million SHU (Scoville Heat Units) pepper spray with UV dye Used worldwide by police officers, law enforcement agencies, security guards, and military agencies 1/2 oz canister fires 10 half-second bursts of a heavy pepper stream pattern between 8 to 10 feet Has a twist lock safety actuator and comes in a black plastic hard case with quick release key ring Measures 3 1/2" tall by 1 1/4" diameter with a 3 year shelf life from manufacture date stamp on can