The First Defense® Inert formulation provides the same functionality and targeting properties as active product duplicating the delivery system for training purposes. The MK-9  will deliver 14 short bursts at an effective range of 18-20 ft. This inert aerosol product utilizes a stream delivery method providing a target-specific, strong concentrated stream for greater standoff. Eye protection should be worn during any force on force training, even though this formula is eye safe.