The MK-4 canister size delivers our 4% MC% formula that is non-flammable and Electronic Discharge Weapon (EDW) safe. The First Defense® 360(°) system delivers a consistent stream pattern at any angle and any orientation. High quality is ensured through an ISO rated manufacturing facility. Independent laboratories confirm these products are consistently made to exacting standards. The yellow color band denotes the .4% MC% formula. When using a flip top safety/activator, this stream will travel 10-12 feet. This minimizes cross contamination and assists in targeting one person. This type of application will target the skin and eyes. The MK-4 canister size will deliver 11-12 short bursts.