Tritium Handgun Glow-in-the-Dark Night Sights for 1911 Pistols UNMATCHED VISIBILITY in low light shooting conditions or complete darkness; GLOWS IN THE DARKno batteries or light exposure required At night, sights are GLOWING GREEN DOTS; In daylight, sights are standard BRIGHT WHITE DOTS Made of tough, CNC-machined steel with a FORTRESS FINISH COATING for maximum protection SNAG RESISTANT DESIGN fits standard holsters; SQUARE-NOTCH DESIGN is duty proven Fits 1911 cut Novak LoMount .270 front / .500 rear (1911 5 Government .45 ACP)