The bright & tough night sights are a self-luminous three dot night sight alternative to traditional iron sights. They are the first choice of Major handgun manufacturers and standard Issue with numerous local, state and Federal law enforcement agencies. Unique lens design for a shorter sight, compact snag free design, hybrid illuminated reticle, single aa-alkaline or lithium battery, rugged aluminum-alloy housing, multi-layer broadband anti-reflective coating, easy push manual brightness control, waterproof to 50 meters 165 ft. WHITE RINGS: Bright & Tough Night Sights feature a white ring around the glowing dots for daylight visibility TRITIUM-PHOSPHOR LAMP: Tritium-filled glass lamp provides superior illumination in no light or low light settings SAPPHIRE WINDOW: Each tritium lamp is capped with a sapphire jewel which helps to evenly distribute the light from the tritium lamp as well as protect it from solvents and puncture PROTECTIVE ALUMINUM CYLINDERS: Contains and protects the tritium gas filled lamps from heavy recoil and harsh cleaning solvents Fits H&K Models. 45C Tactical, P30, P30L, P30SK, and VP9.