Perfect Dot night sights for SIG Sauer P-series pistols from Night Fision use proven Tritium illumination technology in the front sight with a plus: 30% more Tritium for a much brighter, easier-to-locate dot! Paired with a plain black rear sight, the ultra-bright front sight grabs the eye's attention, encouraging instinctive "Front Sight Focus," so your eyes stay on the target. The Tritium insert isn't surrounded by a painted-on ring, but rather one made of a daylight fluorescing material that produces optimum visibility in daylight. The Night Fision folks call it the "Perfect Dot," which provides maximum visibility in both nighttime AND daylight condi Mfg: Night Fision