Ameriglo Tritium 2-Dot Rear Handgun Sight for Glock 42/43/43x/48 Yellow with White Front 71BA3F35. Choose from a variety of heights notch widths and notch shapes.Yellow Tritium 2-Dot White Outlines .256" H .165" Sq NotchFits Glock 42 43 43X 48 models Features of Ameriglo Tritium 2-Dot Rear Handgun Sight for Glock 42/43/43x/48 Yellow with White Front: Wide range of proven rugged illuminated Tritium Rear night sights Variety of heights notch widths and notch shapes Yellow Tritium 2-Dot White Outlines Fits Glock 42 43 43X 48 models Package Contents: Ameriglo Tritium 2-Dot Rear Handgun Sight for Glock 42/43/43x/48 Yellow with White Front Ameriglo GL-8431R: Tritium 2-Dot Rear Handgun Sight for Glock 42/43/43x/48 Yellow with White Front 71BA3F35