First Defense® inert formulation continues to deliver the same function and targeting properties as the corresponding active product. This allows the user to train with confidence. The First Defense® 360(°) system delivers a consistent stream pattern at any angle and any orientation. The stream delivery system will project an inert formulation just like the active units. Eye protection should be worn during any force on force training, even though this formula is eye safe. The MK-3 can size will produce around 6-8 short bursts and project 10-12 feet. This inert version is marked with a green label as a safety feature, since most trainers understand in an instant what that represents.