The Underwood Ammo Xtreme Defender 9mm features innovative 90 grain solid monolithic projectiles delivering exceptional performance with 1475 FPS muzzle velocity and 435 ft lbs muzzle energy.Underwood Ammo Xtreme Defender 9mm ammunition90 grain solid monolithic projectile designHigh-performance 1475 FPS muzzle velocity435 ft lbs muzzle energy for maximum stopping powerPremium nickel-plated brass casing20 rounds per boxEngineered for personal defense and tactical applications this premium ammunition combines cutting-edge projectile technology with consistent performance and reliable feeding in semi-automatic pistols.