Manufaturer Part Number: SOX10002Sig optics pistol sight xray 3 tritium #6 front #8 rear rnd FEATURES-#6 Front / #8 Rear-3-dot tritium system-Superior glowing illumination in low-light & bright white for daylight conditions-Oversized chemical resistant fluorescent front dot-Round rear sight-Fits Classic line, P320, P250, P938, P238 Other Features: 10 year half-life,3-dot tritium system allows for fast target acquisition in low light conditions,oversized chemical resistant front tortured test to 20,000 rnds, steel housing.Fits "classic" line p320,p250,p938,& p238