Ideal sighting solution for carry, sport, or duty handguns; With a half-life of 12 years, the 3-Dot tritium system allows for fast target acquisition in low-light conditions; Comes in standard Sig Sauer sizes of #6 Green Front, #8 Round Rear sights; Oversized chemical resistant fluorescent polymer front dot gives confidence in any environment; Torture tested to 20,000 rounds, the steel housing provides for a tough, reliable sight that lasts as long as the firearm; Fits Classic line, P320, P938, P238