The Hiviz BB2005 is a Birdbuster magnetic front shotgun sight, equipped with two red and two green fiber optic LitePipes. Fifty percent of these LitePipes are round, while the other half sports a triangular shape.Included in the package is a transparent carrying case, allowing for easy transportation and storage. You\'ll also find three magnetic sight frames which provide different visual guides according to your preferences.A unique feature of the Hiviz BB2005 is its set of interchangeable magnets. They can be swapped across different bases to ensure compatibility with virtually all vent-ribbed shotguns.This sight fits perfectly onto ventilated ribs measuring between 1/4\" to 3/8\" in width, offering a versatile solution for various shotgun types.