AMERIGLO offers a wide range of proven, rugged, illuminated Tritium Rear night sights. Choose your outline color (white or black) to surround each green tritium lamp. All models are tritium-illuminated and built to withstand the rigors of everyday carry use. Green Tritium 2-dot Black Outlines Serrated .250" H .165" Sq Notch #8 Fits Most Most SIG Sauer and Springfield XD and Hellcat models (non OSP)