The FastDot H3 sight combines Tritium with the HiViz LitePipe technology for 24 hour illumination. Now you can have the advantage of day and night performance all in one sight system. All steel construction sight sets are rugged and durable, designed for the roughest use, whether it is personal defense and protection, Law Enforcement or Military. This FastDot H3 sight set has a red fiber optic front sight and green tritium rear sight. Factory sight height. Compatible with all generation Glock MOS models chambered in 9mm/.40 S&W/.357 Sig.