Threaded, front bead replacement; Interchangeable style; Fits most common shotguns with a removable front bead; Includes red, white, and green, fiber optic family LitePipes; The Litepipe Diameter is 0.090 inches, and the overall height is 0.160 inches; Five threaded studs (6/48, 3/56, 5/40, 3mm x .5, and 3mm x .6); The LiteWave technology design to gather even more light for quick target acquisition in challenging lighting conditions