TruGlo Tritium Pro Features The TruGlo Tritium Pro sight set is built on a steel frame finished in Black giving it a durable corrosion-resistant base for daily carry and duty use. The front sight uses a Green tritium insert with a white outline a high-visibility combination that stands out against a variety of backgrounds and lighting conditions. During daylight hours the sight functions like a standard white dot sight keeping sight acquisition fast and familiar. Once ambient light fades the tritium insert begins to glow giving the shooter a usable sight picture without needing a weapon light. Because tritium is a self-illuminating isotope the Tritium Pro never requires batteries charging or exposure to light to work unlike photoluminescent sights that fade without a light source. This makes it a dependable option for a home defense or duty handgun that may sit unused for long stretches between range trips. The sight set is built specifically to fit the Springfield Echelon in 9mm Luger ensuring a correct drop-in fit without additional gunsmithing. The TruGlo Tritium Pro gives Echelon owners a proven always-on low-light sighting solution for personal defense and duty carry. Truglo Tritium Pro Specifications Manufacturer: Truglo Model: Tritium Pro Caliber: 9mm Luger Compatible Hosts: Springfield Echelon Frame Material: Steel Color: Black Front Sight Color: Green / White Outline Available At: GrabAGun