Streaks allows the shooter to visually see the projectiles path toward its target.Streak rounds are nonincendiary.They do not generate heat so they are safe to use in environments where tracers are prohibited and can become a serious fire hazard.The results are game-changing in many aspects for the consumer, law enforcement, and military.For indoor range use and low light shooting.Caliber: 40 S&WBullet Type: Total Metal CaseBullet Weight: 180 grMuzzle Velocity: 958 fpsRounds Per Box: 50Boxes Per Case: 20Hazair: Yes