Tritium Pro Night Sights retain the brightness and durability of TruGlo's original green Tritium night sights with added Pro features: a quick and accurate U-notch design, an angled rear sight edge for emergency one-hand operation, and white Focus Lock ring on the front sight for even faster focus. This model is compatible with Beretta Px4 Storm.Specifications:Type: Front/Rear SetFrame Material: SteelFrame Color: Nitride FortressFirearm Fit: Beretta Px4 StormStyle: Square Front/U-Notch RearFront Material: TritiumRear Material: TritiumFront Color: Green with White OutlineRear Color: GreenFirearm Type: Handgun