The mepro hyper-bright fixed day and night sights offer the most reliable illumination for day or night.Mepro hyper-bright fixed sights feature an extremely bright fluorescent contrast colored ring for fast target acquisition in the daytime.These self-illuminated, fixed tritium sights feature an extremely bright colored ring front sight in your choice of green, yellow, or orange, delivering supreme visibility as a night sight or day-night sight.Contrasting front and rear sight colors help shooters focus on the front sight quicker for faster target acquisition in all lighting conditions.Premium grade green swiss-made tritium vials in the front and rear sights allow for low light and nighttime conditions.Front sight length: 0.50".Front sight width: 0.14".Front sight height: 0.23".Rear sight length: 0.28".Rear sight width: 0.83".Rear sight height: 0.28".Rear Color: Green/Tritium Black OutlineFrame Material: SteelFrame Color: BlackFirearm Fit: Glock 9mm/.40 S&W/.357 SIG/.45 GAPStyle: Self Illuminated Fixed Night Sight Set TritiumFront Material: TritiumRear Material: TritiumFront Color: Green/Tritium Green OutlineFirearm Type: Handgun