Beretta night sight kit for 92fs/96fs vertec FEATURES:-M9A3/ Vertec Night Sights Kit feature tritium gas-filled lamps w/ a sapphire front lens which focuses light & is impervious to solvents-The sapphire lens-enhanced tritium vial, is one of the brightest in the industry-The lamps glow bright green in the dark & have white outlines that show as white spots in the daylight-Sight Kit must be installed by a professional gunsmith