The Carlsons Choke Tubes Rifled Choke is engineered for 12 Gauge shotguns utilizing the Mobil choke system, specifically compatible with Beretta and Benelli models. This choke measures 7.8500 inches in length and features a thread pattern of Mobil.Key FeaturesStyle: This choke is designed in the Mobilchoke style, ensuring compatibility with specific Beretta and Benelli shotguns.Thread Pattern: Features a Mobil thread pattern, allowing for easy attachment and removal.