Fits all shotgun ribs with threaded beads; All-steel construction, 1" x 1/4" sight base; Includes green, red, and white LitePipes; Includes mounting screws in five thread sizes to fit all ribbed shotguns; The standard in high performance shotgun bead replacements; The LiteWave technology design to gather even more light for quick target acquisition in challenging lighting conditions; Design offers increased durability with the brightness; Integral LitePipe locking