Fox Labs 5,300,000 SHU UV Marking 1.5 Ounce Flip-Top Safety Cap Pepper Spray Stream The 1.5-ounce unit contains FIVE POINT THREE formula, used by the U.S. Military, all types of municipal, county, state, and federal law enforcement agencies, and civilians around the world The size of the unit is 4” High x 1-3/8” Diameter. *PLEASE NOTE: Please see the link directly from the manufacture (F.A.Q.) 1. What are the six-digit numbers on the can? Unlike other companies that use an expiration date, we use birthdates. The shelf life is 3 years from the date on the can for all 1.5.,2oz.,3oz., and 12oz. units and we recommend replacing 2 years from the date of purchase. For additional questions please go to Manufacture's Website.