The HIVIZ LiteWave H3 ensures fast sight acquisition and a bright sight picture day or night. The LiteWave H3 sight combines tritium with the HIVIZ Litepipe technology for 24 hour illumination which gives the advantage of day and night performance all in one sight system. All steel construction sight sets are rugged and durable, designed for the roughest use, whether it's personal defense, law enforcement, or military. FeaturesSight visibility in all light conditionsUltra bright encapsulated TritiumFactory sight heightsAll steel constructionPatented technology Fits: All 12 and 20 gauge plain barrel shotguns with removable threaded front bead. Sight includes five screws in varying thread sizes to fit nearly any shotgun: 3-56/2.5mm x .45mm; 5-40; 6-48; 3mm x .5; 3mm x .6.