Ultrasonically welded Shell color indicates 2.5g payload 100% waterproof and non-flammable Velocity of 280-300 FPS The classic .68 caliber PepperBall projectile. Contains 2% PAVA, and is excellent for direct impact and area saturation, especially in confined, interior spaces. Ultrasonically welded, 100% waterproof and non-flammable. Ultrasonically welded, shell color indicates 2.5g payload, 100% waterproof and non-flammable, velocity of 280-300 FPS. Shelf life is 3 years.