The better you can see your sights the better you can shoot.TruGlo Tritium Fiber Optic TFO Handgun Night Sights - Green Front & Rear is the ultimate handgun sight. This TruGlo Tritium Sight uses the patented TruGlo TFO technology offering an unbelievable transition through all light conditions.The TruGlow Brite-Site TFO Night Sight provides three green aiming reference dots that glow in the dark using the best tritium available.These Night Sight from TruGlo are created with CNC machined steel construction designed so that the concealed fiber cannot be seen by target.The TruGlo Brite Sight TFO Handgun Sight fits standard holsters and features a snag-resistant design.The TruGlo TG131GT2 high mount model is compatible with Glock 20/21/29/30/31/32/37 excluding MOS models.Features/SpecsRear Color: GreenType: Front/Rear SetFrame Material: SteelFrame Color: BlackFirearm Fit: Glock 20 21 29-32 37Style: SquareFront Material: Tritium/Fiber OpticRear Material: Tritium/Fiber OpticFront Color: GreenFirearm Type: Handgun